121221101012 has 24 divisors (see below), whose sum is σ = 243602214240. Its totient is φ = 52200473760.

The previous prime is 121221101011. The next prime is 121221101041. The reversal of 121221101012 is 210101122121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121221101011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72499823 + ... + 72501494.

It is an arithmetic number, because the mean of its divisors is an integer number (10150092260).

Almost surely, 2^121221101012 is an apocalyptic number.

It is an amenable number.

121221101012 is an abundant number, since it is smaller than the sum of its proper divisors (122381113228).

121221101012 is a wasteful number, since it uses less digits than its factorization.

121221101012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145001351 (or 145001349 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 121221101012 its reverse (210101122121), we get a palindrome (331322223133).

The spelling of 121221101012 in words is "one hundred twenty-one billion, two hundred twenty-one million, one hundred one thousand, twelve".