122120201221021 has 4 divisors (see below), whose sum is σ = 123942890791552. Its totient is φ = 120297511650492.

The previous prime is 122120201221001. The next prime is 122120201221087. The reversal of 122120201221021 is 120122102021221.

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 122120201221021 - 2³¹ = 122118053737373 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 122120201221021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122120201221001) 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, 911344785165 + ... + 911344785298.

It is an arithmetic number, because the mean of its divisors is an integer number (30985722697888).

Almost surely, 2^{122120201221021} is an apocalyptic number.

It is an amenable number.

122120201221021 is a deficient number, since it is larger than the sum of its proper divisors (1822689570531).

122120201221021 is an equidigital number, since it uses as much as digits as its factorization.

122120201221021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1822689570530.

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

Adding to 122120201221021 its reverse (120122102021221), we get a palindrome (242242303242242).

The spelling of 122120201221021 in words is "one hundred twenty-two trillion, one hundred twenty billion, two hundred one million, two hundred twenty-one thousand, twenty-one".