122122122001021 has 4 divisors (see below), whose sum is σ = 122122293391872. Its totient is φ = 122121950610172.

The previous prime is 122122122000997. The next prime is 122122122001031. The reversal of 122122122001021 is 120100221221221.

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 122122122001021 - 2²³ = 122122113612413 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 122122122001021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122122122001031) 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, 84622141 + ... + 86053186.

It is an arithmetic number, because the mean of its divisors is an integer number (30530573347968).

Almost surely, 2^{122122122001021} is an apocalyptic number.

It is an amenable number.

122122122001021 is a deficient number, since it is larger than the sum of its proper divisors (171390851).

122122122001021 is an equidigital number, since it uses as much as digits as its factorization.

122122122001021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171390850.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 122122122001021 its reverse (120100221221221), we get a palindrome (242222343222242).

The spelling of 122122122001021 in words is "one hundred twenty-two trillion, one hundred twenty-two billion, one hundred twenty-two million, one thousand, twenty-one".