31220100332231 has 8 divisors (see below), whose sum is σ = 31285565546880. Its totient is φ = 31154636316672.

The previous prime is 31220100332209. The next prime is 31220100332249. The reversal of 31220100332231 is 13223300102213.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31220100332231 is a prime.

It is a super-2 number, since 2×31220100332231² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31220100332197 and 31220100332206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31220100332251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68208071 + ... + 68664263.

It is an arithmetic number, because the mean of its divisors is an integer number (3910695693360).

Almost surely, 2^{31220100332231} is an apocalyptic number.

31220100332231 is a deficient number, since it is larger than the sum of its proper divisors (65465214649).

31220100332231 is a wasteful number, since it uses less digits than its factorization.

31220100332231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 599545.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 31220100332231 its reverse (13223300102213), we get a palindrome (44443400434444).

The spelling of 31220100332231 in words is "thirty-one trillion, two hundred twenty billion, one hundred million, three hundred thirty-two thousand, two hundred thirty-one".