21031202233031 has 8 divisors (see below), whose sum is σ = 21669970161840. Its totient is φ = 20396137307328.

The previous prime is 21031202233021. The next prime is 21031202233033. The reversal of 21031202233031 is 13033220213012.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21031202233031 is a prime.

It is a super-2 number, since 2×21031202233031² (a number of 27 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 = 21031202232988 and 21031202233006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21031202233033) 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, 925739246 + ... + 925761963.

It is an arithmetic number, because the mean of its divisors is an integer number (2708746270230).

Almost surely, 2^{21031202233031} is an apocalyptic number.

21031202233031 is a deficient number, since it is larger than the sum of its proper divisors (638767928809).

21031202233031 is a wasteful number, since it uses less digits than its factorization.

21031202233031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1851501553.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 21031202233031 its reverse (13033220213012), we get a palindrome (34064422446043).

The spelling of 21031202233031 in words is "twenty-one trillion, thirty-one billion, two hundred two million, two hundred thirty-three thousand, thirty-one".