1221100000102 has 32 divisors (see below), whose sum is σ = 1992799065600. Its totient is φ = 559288411488.

The previous prime is 1221100000063. The next prime is 1221100000139. The reversal of 1221100000102 is 2010000011221.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3970477 + ... + 4266952.

It is an arithmetic number, because the mean of its divisors is an integer number (62274970800).

Almost surely, 2^{1221100000102} is an apocalyptic number.

1221100000102 is a deficient number, since it is larger than the sum of its proper divisors (771699065498).

1221100000102 is a wasteful number, since it uses less digits than its factorization.

1221100000102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8237580.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 1221100000102 its reverse (2010000011221), we get a palindrome (3231100011323).

The spelling of 1221100000102 in words is "one trillion, two hundred twenty-one billion, one hundred million, one hundred two", and thus it is an aban number.