21230202213031 has 12 divisors (see below), whose sum is σ = 24696705355920. Its totient is φ = 18197059997760.

The previous prime is 21230202213019. The next prime is 21230202213043. The reversal of 21230202213031 is 13031220203212.

It is an interprime number because it is at equal distance from previous prime (21230202213019) and next prime (21230202213043).

It is not a de Polignac number, because 21230202213031 - 2¹⁵ = 21230202180263 is a prime.

It is a super-2 number, since 2×21230202213031² (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 = 21230202212993 and 21230202213011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21230202213001) 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, 508191 + ... + 6535951.

It is an arithmetic number, because the mean of its divisors is an integer number (2058058779660).

Almost surely, 2^{21230202213031} is an apocalyptic number.

21230202213031 is a deficient number, since it is larger than the sum of its proper divisors (3466503142889).

21230202213031 is an equidigital number, since it uses as much as digits as its factorization.

21230202213031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6099654 (or 6099647 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 21230202213031 its reverse (13031220203212), we get a palindrome (34261422416243).

The spelling of 21230202213031 in words is "twenty-one trillion, two hundred thirty billion, two hundred two million, two hundred thirteen thousand, thirty-one".