22121201011021 has 4 divisors (see below), whose sum is σ = 25281372584032. Its totient is φ = 18961029438012.

The previous prime is 22121201010973. The next prime is 22121201011031. The reversal of 22121201011021 is 12011010212122.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 22121201011021 - 2¹⁷ = 22121200879949 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22121201010986 and 22121201011004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22121201011031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1580085786495 + ... + 1580085786508.

It is an arithmetic number, because the mean of its divisors is an integer number (6320343146008).

Almost surely, 2^{22121201011021} is an apocalyptic number.

It is an amenable number.

22121201011021 is a deficient number, since it is larger than the sum of its proper divisors (3160171573011).

22121201011021 is an equidigital number, since it uses as much as digits as its factorization.

22121201011021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3160171573010.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 22121201011021 its reverse (12011010212122), we get a palindrome (34132211223143).

The spelling of 22121201011021 in words is "twenty-two trillion, one hundred twenty-one billion, two hundred one million, eleven thousand, twenty-one".