121123210122 has 36 divisors (see below), whose sum is σ = 271795140630. Its totient is φ = 38982177696.

The previous prime is 121123210097. The next prime is 121123210123. The reversal of 121123210122 is 221012321121.

It can be written as a sum of positive squares in 3 ways, for example, as 89107623081 + 32015587041 = 298509^2 + 178929^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 121123210095 and 121123210104.

It is not an unprimeable number, because it can be changed into a prime (121123210123) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 3985497 + ... + 4015772.

Almost surely, 2^121123210122 is an apocalyptic number.

121123210122 is an abundant number, since it is smaller than the sum of its proper divisors (150671930508).

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

121123210122 is a wasteful number, since it uses less digits than its factorization.

121123210122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8001335 (or 8001303 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 121123210122 its reverse (221012321121), we get a palindrome (342135531243).

The spelling of 121123210122 in words is "one hundred twenty-one billion, one hundred twenty-three million, two hundred ten thousand, one hundred twenty-two".