121440312100 has 36 divisors (see below), whose sum is σ = 263550406000. Its totient is φ = 48571529760.

The previous prime is 121440312067. The next prime is 121440312109. The reversal of 121440312100 is 1213044121.

It is not an unprimeable number, because it can be changed into a prime (121440312109) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1126351 + ... + 1229449.

Almost surely, 2^121440312100 is an apocalyptic number.

121440312100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121440312100 is an abundant number, since it is smaller than the sum of its proper divisors (142110093900).

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

121440312100 is a wasteful number, since it uses less digits than its factorization.

121440312100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114892 (or 114885 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 121440312100 its reverse (1213044121), we get a palindrome (122653356221).

The spelling of 121440312100 in words is "one hundred twenty-one billion, four hundred forty million, three hundred twelve thousand, one hundred".