21112023331 has 12 divisors (see below), whose sum is σ = 24574646208. Its totient is φ = 18084406032.

The previous prime is 21112023301. The next prime is 21112023343. The reversal of 21112023331 is 13332021112.

It is not a de Polignac number, because 21112023331 - 2¹⁵ = 21111990563 is a prime.

It is a super-2 number, since 2×21112023331² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21112023299 and 21112023308.

It is not an unprimeable number, because it can be changed into a prime (21112023301) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 60696 + ... + 214261.

It is an arithmetic number, because the mean of its divisors is an integer number (2047887184).

Almost surely, 2^21112023331 is an apocalyptic number.

21112023331 is a deficient number, since it is larger than the sum of its proper divisors (3462622877).

21112023331 is a wasteful number, since it uses less digits than its factorization.

21112023331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276538 (or 276531 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 21112023331 its reverse (13332021112), we get a palindrome (34444044443).

The spelling of 21112023331 in words is "twenty-one billion, one hundred twelve million, twenty-three thousand, three hundred thirty-one".