31113130223021 has 16 divisors (see below), whose sum is σ = 39838785210240. Its totient is φ = 23588754396480.

The previous prime is 31113130223003. The next prime is 31113130223041. The reversal of 31113130223021 is 12032203131113.

It is not a de Polignac number, because 31113130223021 - 2²² = 31113126028717 is a prime.

It is a super-3 number, since 3×31113130223021³ (a number of 41 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31113130223041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5460356966 + ... + 5460362663.

It is an arithmetic number, because the mean of its divisors is an integer number (2489924075640).

Almost surely, 2^{31113130223021} is an apocalyptic number.

It is an amenable number.

31113130223021 is a deficient number, since it is larger than the sum of its proper divisors (8725654987219).

31113130223021 is a wasteful number, since it uses less digits than its factorization.

31113130223021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10920719684.

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

Adding to 31113130223021 its reverse (12032203131113), we get a palindrome (43145333354134).

The spelling of 31113130223021 in words is "thirty-one trillion, one hundred thirteen billion, one hundred thirty million, two hundred twenty-three thousand, twenty-one".