21222021030031 has 4 divisors (see below), whose sum is σ = 21352217478232. Its totient is φ = 21091824581832.

The previous prime is 21222021030017. The next prime is 21222021030043. The reversal of 21222021030031 is 13003012022212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21222021030031 - 2³⁵ = 21187661291663 is a prime.

It is a super-2 number, since 2×21222021030031² (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 = 21222021029990 and 21222021030008.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21222021030011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65098223856 + ... + 65098224181.

It is an arithmetic number, because the mean of its divisors is an integer number (5338054369558).

Almost surely, 2^{21222021030031} is an apocalyptic number.

21222021030031 is a deficient number, since it is larger than the sum of its proper divisors (130196448201).

21222021030031 is a wasteful number, since it uses less digits than its factorization.

21222021030031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130196448200.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 21222021030031 its reverse (13003012022212), we get a palindrome (34225033052243).

The spelling of 21222021030031 in words is "twenty-one trillion, two hundred twenty-two billion, twenty-one million, thirty thousand, thirty-one".