21210302333031 has 12 divisors (see below), whose sum is σ = 32897611782072. Its totient is φ = 12120172761648.

The previous prime is 21210302333029. The next prime is 21210302333053. The reversal of 21210302333031 is 13033320301212.

It is not a de Polignac number, because 21210302333031 - 2¹ = 21210302333029 is a prime.

It is a super-2 number, since 2×21210302333031² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21210302332992 and 21210302333010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21210302333131) 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, 72143885340 + ... + 72143885633.

It is an arithmetic number, because the mean of its divisors is an integer number (2741467648506).

Almost surely, 2^{21210302333031} is an apocalyptic number.

21210302333031 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

21210302333031 is a deficient number, since it is larger than the sum of its proper divisors (11687309449041).

21210302333031 is a wasteful number, since it uses less digits than its factorization.

21210302333031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144287770990 (or 144287770983 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 24.

Adding to 21210302333031 its reverse (13033320301212), we get a palindrome (34243622634243).

The spelling of 21210302333031 in words is "twenty-one trillion, two hundred ten billion, three hundred two million, three hundred thirty-three thousand, thirty-one".