21020030330031 has 32 divisors (see below), whose sum is σ = 32342395622400. Its totient is φ = 13482736079040.

The previous prime is 21020030329999. The next prime is 21020030330063. The reversal of 21020030330031 is 13003303002012.

21020030330031 is a `hidden beast` number, since 2 + 10 + 20 + 0 + 303 + 300 + 31 = 666.

It is an interprime number because it is at equal distance from previous prime (21020030329999) and next prime (21020030330063).

It is not a de Polignac number, because 21020030330031 - 2⁵ = 21020030329999 is a prime.

It is a super-2 number, since 2×21020030330031² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21020030329986 and 21020030330013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21020030330081) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 140300110 + ... + 140449851.

It is an arithmetic number, because the mean of its divisors is an integer number (1010699863200).

Almost surely, 2^{21020030330031} is an apocalyptic number.

21020030330031 is a deficient number, since it is larger than the sum of its proper divisors (11322365292369).

21020030330031 is a wasteful number, since it uses less digits than its factorization.

21020030330031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280750076 (or 280750070 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 18.

Adding to 21020030330031 its reverse (13003303002012), we get a palindrome (34023333332043).

The spelling of 21020030330031 in words is "twenty-one trillion, twenty billion, thirty million, three hundred thirty thousand, thirty-one".