20221058021 has 4 divisors (see below), whose sum is σ = 20231832972. Its totient is φ = 20210283072.

The previous prime is 20221058003. The next prime is 20221058029. The reversal of 20221058021 is 12085012202.

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

It can be written as a sum of positive squares in 2 ways, for example, as 11387877796 + 8833180225 = 106714^2 + 93985^2 .

It is a cyclic number.

It is not a de Polignac number, because 20221058021 - 2¹⁴ = 20221041637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20221058029) 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, 5384660 + ... + 5388413.

It is an arithmetic number, because the mean of its divisors is an integer number (5057958243).

Almost surely, 2^20221058021 is an apocalyptic number.

It is an amenable number.

20221058021 is a deficient number, since it is larger than the sum of its proper divisors (10774951).

20221058021 is a wasteful number, since it uses less digits than its factorization.

20221058021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10774950.

The product of its (nonzero) digits is 640, while the sum is 23.

The spelling of 20221058021 in words is "twenty billion, two hundred twenty-one million, fifty-eight thousand, twenty-one".