122210211200021 has 4 divisors (see below), whose sum is σ = 139668812800032. Its totient is φ = 104751609600012.

The previous prime is 122210211200003. The next prime is 122210211200027. The reversal of 122210211200021 is 120002112012221.

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 122210211200021 - 2¹⁸ = 122210210937877 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 (122210211200027) 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, 8729300799995 + ... + 8729300800008.

It is an arithmetic number, because the mean of its divisors is an integer number (34917203200008).

Almost surely, 2^{122210211200021} is an apocalyptic number.

It is an amenable number.

122210211200021 is a deficient number, since it is larger than the sum of its proper divisors (17458601600011).

122210211200021 is an equidigital number, since it uses as much as digits as its factorization.

122210211200021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17458601600010.

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

Adding to 122210211200021 its reverse (120002112012221), we get a palindrome (242212323212242).

The spelling of 122210211200021 in words is "one hundred twenty-two trillion, two hundred ten billion, two hundred eleven million, two hundred thousand, twenty-one".