61312743722121 has 64 divisors (see below), whose sum is σ = 83213593214976. Its totient is φ = 40152581280000.

The previous prime is 61312743722099. The next prime is 61312743722149. The reversal of 61312743722121 is 12122734721316.

It is a happy number.

It is not a de Polignac number, because 61312743722121 - 2¹⁴ = 61312743705737 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61312743742121) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 12076567035 + ... + 12076572111.

It is an arithmetic number, because the mean of its divisors is an integer number (1300212393984).

Almost surely, 2^{61312743722121} is an apocalyptic number.

It is an amenable number.

61312743722121 is a deficient number, since it is larger than the sum of its proper divisors (21900849492855).

61312743722121 is a wasteful number, since it uses less digits than its factorization.

61312743722121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6182.

The product of its digits is 169344, while the sum is 42.

The spelling of 61312743722121 in words is "sixty-one trillion, three hundred twelve billion, seven hundred forty-three million, seven hundred twenty-two thousand, one hundred twenty-one".