31230000021123 has 8 divisors (see below), whose sum is σ = 46266666698000. Its totient is φ = 20820000014064.

The previous prime is 31230000021097. The next prime is 31230000021131. The reversal of 31230000021123 is 32112000003213.

It is not a de Polignac number, because 31230000021123 - 2⁸ = 31230000020867 is a prime.

It is a super-2 number, since 2×31230000021123² (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 = 31230000021096 and 31230000021105.

It is not an unprimeable number, because it can be changed into a prime (31230000021173) 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, 578333333698 + ... + 578333333751.

It is an arithmetic number, because the mean of its divisors is an integer number (5783333337250).

Almost surely, 2^{31230000021123} is an apocalyptic number.

31230000021123 is a deficient number, since it is larger than the sum of its proper divisors (15036666676877).

31230000021123 is a wasteful number, since it uses less digits than its factorization.

31230000021123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1156666667458 (or 1156666667452 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 31230000021123 its reverse (32112000003213), we get a palindrome (63342000024336).

The spelling of 31230000021123 in words is "thirty-one trillion, two hundred thirty billion, twenty-one thousand, one hundred twenty-three".