2131245542361 has 24 divisors (see below), whose sum is σ = 3239015351520. Its totient is φ = 1242507517056.

The previous prime is 2131245542359. The next prime is 2131245542369. The reversal of 2131245542361 is 1632455421312.

It is not a de Polignac number, because 2131245542361 - 2¹ = 2131245542359 is a prime.

It is a super-5 number, since 5×2131245542361⁵ (a number of 63 digits) contains 55555 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (2131245542369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 110612476 + ... + 110631741.

It is an arithmetic number, because the mean of its divisors is an integer number (134958972980).

Almost surely, 2^{2131245542361} is an apocalyptic number.

It is an amenable number.

2131245542361 is a deficient number, since it is larger than the sum of its proper divisors (1107769809159).

2131245542361 is a wasteful number, since it uses less digits than its factorization.

2131245542361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221244265 (or 221244252 counting only the distinct ones).

The product of its digits is 172800, while the sum is 39.

The spelling of 2131245542361 in words is "two trillion, one hundred thirty-one billion, two hundred forty-five million, five hundred forty-two thousand, three hundred sixty-one".