31332130221101 has 4 divisors (see below), whose sum is σ = 31332168471804. Its totient is φ = 31332091970400.

The previous prime is 31332130221053. The next prime is 31332130221113. The reversal of 31332130221101 is 10112203123313.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18823536732100 + 12508593489001 = 4338610^2 + 3536749^2 .

It is a cyclic number.

It is not a de Polignac number, because 31332130221101 - 2²² = 31332126026797 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 (31332130221151) 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, 17869160 + ... + 19544081.

It is an arithmetic number, because the mean of its divisors is an integer number (7833042117951).

Almost surely, 2^{31332130221101} is an apocalyptic number.

It is an amenable number.

31332130221101 is a deficient number, since it is larger than the sum of its proper divisors (38250703).

31332130221101 is an equidigital number, since it uses as much as digits as its factorization.

31332130221101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38250702.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 31332130221101 its reverse (10112203123313), we get a palindrome (41444333344414).

The spelling of 31332130221101 in words is "thirty-one trillion, three hundred thirty-two billion, one hundred thirty million, two hundred twenty-one thousand, one hundred one".