122221012021 has 4 divisors (see below), whose sum is σ = 126163625344. Its totient is φ = 118278398700.

The previous prime is 122221012009. The next prime is 122221012073. The reversal of 122221012021 is 120210122221.

It is a happy number.

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 122221012021 - 2²⁵ = 122187457589 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 122221011986 and 122221012004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122221012621) 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, 1971306615 + ... + 1971306676.

It is an arithmetic number, because the mean of its divisors is an integer number (31540906336).

Almost surely, 2^122221012021 is an apocalyptic number.

It is an amenable number.

122221012021 is a deficient number, since it is larger than the sum of its proper divisors (3942613323).

122221012021 is an equidigital number, since it uses as much as digits as its factorization.

122221012021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3942613322.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 122221012021 its reverse (120210122221), we get a palindrome (242431134242).

The spelling of 122221012021 in words is "one hundred twenty-two billion, two hundred twenty-one million, twelve thousand, twenty-one".