31211020023 has 8 divisors (see below), whose sum is σ = 41616593136. Its totient is φ = 20806396800.

The previous prime is 31211020019. The next prime is 31211020067. The reversal of 31211020023 is 32002011213.

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

It is not a de Polignac number, because 31211020023 - 2² = 31211020019 is a prime.

It is a super-2 number, since 2×31211020023² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31211019984 and 31211020011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31211020003) 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, 156898 + ... + 295023.

It is an arithmetic number, because the mean of its divisors is an integer number (5202074142).

Almost surely, 2^31211020023 is an apocalyptic number.

31211020023 is a deficient number, since it is larger than the sum of its proper divisors (10405573113).

31211020023 is a wasteful number, since it uses less digits than its factorization.

31211020023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 474945.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 31211020023 its reverse (32002011213), we get a palindrome (63213031236).

The spelling of 31211020023 in words is "thirty-one billion, two hundred eleven million, twenty thousand, twenty-three".