122151421560 has 128 divisors (see below), whose sum is σ = 420975406080. Its totient is φ = 27775623168.

The previous prime is 122151421523. The next prime is 122151421571. The reversal of 122151421560 is 65124151221.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 214612 + ... + 538851.

It is an arithmetic number, because the mean of its divisors is an integer number (3288870360).

Almost surely, 2^122151421560 is an apocalyptic number.

122151421560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

122151421560 is an abundant number, since it is smaller than the sum of its proper divisors (298823984520).

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

122151421560 is a wasteful number, since it uses less digits than its factorization.

122151421560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 753677 (or 753673 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 30.

Adding to 122151421560 its reverse (65124151221), we get a palindrome (187275572781).

The spelling of 122151421560 in words is "one hundred twenty-two billion, one hundred fifty-one million, four hundred twenty-one thousand, five hundred sixty".