222221122112100 has 144 divisors (see below), whose sum is σ = 660542953795200. Its totient is φ = 57639395589120.

The previous prime is 222221122112089. The next prime is 222221122112111. The reversal of 222221122112100 is 1211221122222.

It is an interprime number because it is at equal distance from previous prime (222221122112089) and next prime (222221122112111).

It is a super-2 number, since 2×222221122112100² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 32500561 + ... + 38739239.

It is an arithmetic number, because the mean of its divisors is an integer number (4587103845800).

Almost surely, 2^{222221122112100} is an apocalyptic number.

222221122112100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 222221122112100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (330271476897600).

222221122112100 is an abundant number, since it is smaller than the sum of its proper divisors (438321831683100).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

222221122112100 is a wasteful number, since it uses less digits than its factorization.

222221122112100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6241942 (or 6241935 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 222221122112100 its reverse (1211221122222), we get a palindrome (223432343234322).

It can be divided in two parts, 222221122 and 112100, that added together give a palindrome (222333222).

The spelling of 222221122112100 in words is "two hundred twenty-two trillion, two hundred twenty-one billion, one hundred twenty-two million, one hundred twelve thousand, one hundred".