61506120062121 has 32 divisors (see below), whose sum is σ = 94915228262400. Its totient is φ = 34699547188800.

The previous prime is 61506120062119. The next prime is 61506120062129. The reversal of 61506120062121 is 12126002160516.

It is not a de Polignac number, because 61506120062121 - 2¹ = 61506120062119 is a prime.

It is a super-4 number, since 4×61506120062121⁴ (a number of 56 digits) contains 4444 as substring. Note that it is a super-d number also for d = 3.

It is not an unprimeable number, because it can be changed into a prime (61506120062129) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29293596 + ... + 31322946.

It is an arithmetic number, because the mean of its divisors is an integer number (2966100883200).

Almost surely, 2^{61506120062121} is an apocalyptic number.

It is an amenable number.

61506120062121 is a deficient number, since it is larger than the sum of its proper divisors (33409108200279).

61506120062121 is a wasteful number, since it uses less digits than its factorization.

61506120062121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2047709.

The product of its (nonzero) digits is 8640, while the sum is 33.

The spelling of 61506120062121 in words is "sixty-one trillion, five hundred six billion, one hundred twenty million, sixty-two thousand, one hundred twenty-one".