21112022201021 has 2 divisors, whose sum is σ = 21112022201022. Its totient is φ = 21112022201020.

The previous prime is 21112022200967. The next prime is 21112022201041. The reversal of 21112022201021 is 12010222021112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18423504492121 + 2688517708900 = 4292261^2 + 1639670^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21112022201021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21112022201041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10556011100510 + 10556011100511.

It is an arithmetic number, because the mean of its divisors is an integer number (10556011100511).

Almost surely, 2^{21112022201021} is an apocalyptic number.

It is an amenable number.

21112022201021 is a deficient number, since it is larger than the sum of its proper divisors (1).

21112022201021 is an equidigital number, since it uses as much as digits as its factorization.

21112022201021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21112022201021 its reverse (12010222021112), we get a palindrome (33122244222133).

The spelling of 21112022201021 in words is "twenty-one trillion, one hundred twelve billion, twenty-two million, two hundred one thousand, twenty-one".