121222121102 has 32 divisors (see below), whose sum is σ = 196677942912. Its totient is φ = 55817109504.

The previous prime is 121222121101. The next prime is 121222121123. The reversal of 121222121102 is 201121222121.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121222121101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7971218 + ... + 7986410.

It is an arithmetic number, because the mean of its divisors is an integer number (6146185716).

Almost surely, 2^121222121102 is an apocalyptic number.

121222121102 is a deficient number, since it is larger than the sum of its proper divisors (75455821810).

121222121102 is a wasteful number, since it uses less digits than its factorization.

121222121102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20252.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 121222121102 its reverse (201121222121), we get a palindrome (322343343223).

The spelling of 121222121102 in words is "one hundred twenty-one billion, two hundred twenty-two million, one hundred twenty-one thousand, one hundred two".