122221020021 has 4 divisors (see below), whose sum is σ = 162961360032. Its totient is φ = 81480680012.

The previous prime is 122221020017. The next prime is 122221020037. The reversal of 122221020021 is 120020122221.

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 122221020021 - 2² = 122221020017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122221020071) 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, 20370170001 + ... + 20370170006.

It is an arithmetic number, because the mean of its divisors is an integer number (40740340008).

Almost surely, 2^122221020021 is an apocalyptic number.

It is an amenable number.

122221020021 is a deficient number, since it is larger than the sum of its proper divisors (40740340011).

122221020021 is an equidigital number, since it uses as much as digits as its factorization.

122221020021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40740340010.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 122221020021 its reverse (120020122221), we get a palindrome (242241142242).

The spelling of 122221020021 in words is "one hundred twenty-two billion, two hundred twenty-one million, twenty thousand, twenty-one".