121544122747720 has 32 divisors (see below), whose sum is σ = 278109433411200. Its totient is φ = 47793621147328.

The previous prime is 121544122747711. The next prime is 121544122747757. The reversal of 121544122747720 is 27747221445121.

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, 25750871104 + ... + 25750875823.

It is an arithmetic number, because the mean of its divisors is an integer number (8690919794100).

Almost surely, 2^{121544122747720} is an apocalyptic number.

121544122747720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121544122747720 is an abundant number, since it is smaller than the sum of its proper divisors (156565310663480).

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

121544122747720 is a wasteful number, since it uses less digits than its factorization.

121544122747720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51501746997 (or 51501746993 counting only the distinct ones).

The product of its (nonzero) digits is 1756160, while the sum is 49.

The spelling of 121544122747720 in words is "one hundred twenty-one trillion, five hundred forty-four billion, one hundred twenty-two million, seven hundred forty-seven thousand, seven hundred twenty".