21122040031 has 8 divisors (see below), whose sum is σ = 22366865664. Its totient is φ = 19877475840.

The previous prime is 21122039971. The next prime is 21122040073. The reversal of 21122040031 is 13004022112.

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

It is a cyclic number.

It is not a de Polignac number, because 21122040031 - 2¹¹ = 21122037983 is a prime.

It is a super-2 number, since 2×21122040031² (a number of 21 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 = 21122039987 and 21122040014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21122040131) 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, 115266 + ... + 235648.

It is an arithmetic number, because the mean of its divisors is an integer number (2795858208).

Almost surely, 2^21122040031 is an apocalyptic number.

21122040031 is a deficient number, since it is larger than the sum of its proper divisors (1244825633).

21122040031 is a wasteful number, since it uses less digits than its factorization.

21122040031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130721.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 21122040031 its reverse (13004022112), we get a palindrome (34126062143).

The spelling of 21122040031 in words is "twenty-one billion, one hundred twenty-two million, forty thousand, thirty-one".