60557212121 has 4 divisors (see below), whose sum is σ = 69208242432. Its totient is φ = 51906181812.

The previous prime is 60557212117. The next prime is 60557212159. The reversal of 60557212121 is 12121275506.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 60557212121 - 2² = 60557212117 is a prime.

60557212121 is a modest number, since divided by 212121 gives 60557 as remainder.

It is not an unprimeable number, because it can be changed into a prime (60557212171) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4325515145 + ... + 4325515158.

It is an arithmetic number, because the mean of its divisors is an integer number (17302060608).

Almost surely, 2^60557212121 is an apocalyptic number.

It is an amenable number.

60557212121 is a deficient number, since it is larger than the sum of its proper divisors (8651030311).

60557212121 is an equidigital number, since it uses as much as digits as its factorization.

60557212121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8651030310.

The product of its (nonzero) digits is 8400, while the sum is 32.

Adding to 60557212121 its reverse (12121275506), we get a palindrome (72678487627).

The spelling of 60557212121 in words is "sixty billion, five hundred fifty-seven million, two hundred twelve thousand, one hundred twenty-one".