1221200022102 has 32 divisors (see below), whose sum is σ = 2500653133440. Its totient is φ = 397368834240.

The previous prime is 1221200022083. The next prime is 1221200022127. The reversal of 1221200022102 is 2012200021221.

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, 931152 + ... + 1819187.

It is an arithmetic number, because the mean of its divisors is an integer number (78145410420).

Almost surely, 2^{1221200022102} is an apocalyptic number.

1221200022102 is an abundant number, since it is smaller than the sum of its proper divisors (1279453111338).

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

1221200022102 is a wasteful number, since it uses less digits than its factorization.

1221200022102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2752108.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 1221200022102 its reverse (2012200021221), we get a palindrome (3233400043323).

The spelling of 1221200022102 in words is "one trillion, two hundred twenty-one billion, two hundred million, twenty-two thousand, one hundred two".