222121110002100 has 144 divisors (see below), whose sum is σ = 660089833588416. Its totient is φ = 57627061632000.

The previous prime is 222121110002021. The next prime is 222121110002119. The reversal of 222121110002100 is 1200011121222.

222121110002100 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 222121110002100.

It is a congruent number.

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, 147223560 + ... + 148724640.

Almost surely, 2^{222121110002100} is an apocalyptic number.

222121110002100 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 222121110002100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (330044916794208).

222121110002100 is an abundant number, since it is smaller than the sum of its proper divisors (437968723586316).

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

222121110002100 is a wasteful number, since it uses less digits than its factorization.

222121110002100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1514466 (or 1514459 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 222121110002100 its reverse (1200011121222), we get a palindrome (223321121123322).

The spelling of 222121110002100 in words is "two hundred twenty-two trillion, one hundred twenty-one billion, one hundred ten million, two thousand, one hundred".