31123203332201 has 4 divisors (see below), whose sum is σ = 31182712325712. Its totient is φ = 31063694338692.

The previous prime is 31123203332189. The next prime is 31123203332219. The reversal of 31123203332201 is 10223330232113.

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 31123203332201 - 2³⁸ = 30848325425257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31123203932201) 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, 29754495971 + ... + 29754497016.

It is an arithmetic number, because the mean of its divisors is an integer number (7795678081428).

Almost surely, 2^{31123203332201} is an apocalyptic number.

It is an amenable number.

31123203332201 is a deficient number, since it is larger than the sum of its proper divisors (59508993511).

31123203332201 is an equidigital number, since it uses as much as digits as its factorization.

31123203332201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59508993510.

The product of its (nonzero) digits is 3888, while the sum is 26.

Adding to 31123203332201 its reverse (10223330232113), we get a palindrome (41346533564314).

The spelling of 31123203332201 in words is "thirty-one trillion, one hundred twenty-three billion, two hundred three million, three hundred thirty-two thousand, two hundred one".