121254502120 has 32 divisors (see below), whose sum is σ = 272939780520. Its totient is φ = 48480974080.

The previous prime is 121254502111. The next prime is 121254502123. The reversal of 121254502120 is 21205452121.

It can be written as a sum of positive squares in 4 ways, for example, as 49808419684 + 71446082436 = 223178^2 + 267294^2 .

It is not an unprimeable number, because it can be changed into a prime (121254502123) 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, 556351 + ... + 742990.

Almost surely, 2^121254502120 is an apocalyptic number.

121254502120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121254502120 is an abundant number, since it is smaller than the sum of its proper divisors (151685278400).

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

121254502120 is a wasteful number, since it uses less digits than its factorization.

121254502120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1301685 (or 1301681 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 25.

Adding to 121254502120 its reverse (21205452121), we get a palindrome (142459954241).

The spelling of 121254502120 in words is "one hundred twenty-one billion, two hundred fifty-four million, five hundred two thousand, one hundred twenty".