2031545051221 has 4 divisors (see below), whose sum is σ = 2321765772832. Its totient is φ = 1741324329612.

The previous prime is 2031545051203. The next prime is 2031545051279. The reversal of 2031545051221 is 1221505451302.

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 not a de Polignac number, because 2031545051221 - 2⁵ = 2031545051189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2031545051201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 145110360795 + ... + 145110360808.

It is an arithmetic number, because the mean of its divisors is an integer number (580441443208).

Almost surely, 2^{2031545051221} is an apocalyptic number.

It is an amenable number.

2031545051221 is a deficient number, since it is larger than the sum of its proper divisors (290220721611).

2031545051221 is an equidigital number, since it uses as much as digits as its factorization.

2031545051221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290220721610.

The product of its (nonzero) digits is 12000, while the sum is 31.

The spelling of 2031545051221 in words is "two trillion, thirty-one billion, five hundred forty-five million, fifty-one thousand, two hundred twenty-one".