121561025060 has 24 divisors (see below), whose sum is σ = 255301865280. Its totient is φ = 48619893344.

The previous prime is 121561025021. The next prime is 121561025093. The reversal of 121561025060 is 60520165121.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57224 + ... + 496383.

It is an arithmetic number, because the mean of its divisors is an integer number (10637577720).

Almost surely, 2^121561025060 is an apocalyptic number.

121561025060 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121561025060 is an abundant number, since it is smaller than the sum of its proper divisors (133740840220).

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

121561025060 is a wasteful number, since it uses less digits than its factorization.

121561025060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 564595 (or 564593 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 29.

The spelling of 121561025060 in words is "one hundred twenty-one billion, five hundred sixty-one million, twenty-five thousand, sixty".