20522072210721 has 8 divisors (see below), whose sum is σ = 27425956397280. Its totient is φ = 13649784748992.

The previous prime is 20522072210701. The next prime is 20522072210741. The reversal of 20522072210721 is 12701227022502.

It is an interprime number because it is at equal distance from previous prime (20522072210701) and next prime (20522072210741).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20522072210721 - 2¹⁵ = 20522072177953 is a prime.

It is a super-2 number, since 2×20522072210721² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20522072210701) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7899179691 + ... + 7899182288.

It is an arithmetic number, because the mean of its divisors is an integer number (3428244549660).

Almost surely, 2^{20522072210721} is an apocalyptic number.

It is an amenable number.

20522072210721 is a deficient number, since it is larger than the sum of its proper divisors (6903884186559).

20522072210721 is a wasteful number, since it uses less digits than its factorization.

20522072210721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15798362415.

The product of its (nonzero) digits is 15680, while the sum is 33.

The spelling of 20522072210721 in words is "twenty trillion, five hundred twenty-two billion, seventy-two million, two hundred ten thousand, seven hundred twenty-one".