121222221102 has 24 divisors (see below), whose sum is σ = 269746745736. Its totient is φ = 39315314736.

The previous prime is 121222221097. The next prime is 121222221137. The reversal of 121222221102 is 201122222121.

It is a happy number.

121222221102 is a `hidden beast` number, since 121 + 222 + 221 + 102 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 91007008 + ... + 91008339.

It is an arithmetic number, because the mean of its divisors is an integer number (11239447739).

Almost surely, 2^121222221102 is an apocalyptic number.

121222221102 is an abundant number, since it is smaller than the sum of its proper divisors (148524524634).

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

121222221102 is a wasteful number, since it uses less digits than its factorization.

121222221102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182015392 (or 182015389 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 121222221102 its reverse (201122222121), we get a palindrome (322344443223).

The spelling of 121222221102 in words is "one hundred twenty-one billion, two hundred twenty-two million, two hundred twenty-one thousand, one hundred two".