1222101221100 has 144 divisors (see below), whose sum is σ = 3883877249280. Its totient is φ = 295317792000.

The previous prime is 1222101221087. The next prime is 1222101221113. The reversal of 1222101221100 is 11221012221.

It is an interprime number because it is at equal distance from previous prime (1222101221087) and next prime (1222101221113).

It is a super-2 number, since 2×1222101221100² (a number of 25 digits) contains 22 as substring.

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 1222101221100.

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, 4529851 + ... + 4792050.

Almost surely, 2^{1222101221100} is an apocalyptic number.

1222101221100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1222101221100 is an abundant number, since it is smaller than the sum of its proper divisors (2661776028180).

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

1222101221100 is a wasteful number, since it uses less digits than its factorization.

1222101221100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9321960 (or 9321953 counting only the distinct ones).

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

Adding to 1222101221100 its reverse (11221012221), we get a palindrome (1233322233321).

The spelling of 1222101221100 in words is "one trillion, two hundred twenty-two billion, one hundred one million, two hundred twenty-one thousand, one hundred".