122220120002021 has 4 divisors (see below), whose sum is σ = 122220417102912. Its totient is φ = 122219822901132.

The previous prime is 122220120001877. The next prime is 122220120002053. The reversal of 122220120002021 is 120200021022221.

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 a de Polignac number, because none of the positive numbers 2^k-122220120002021 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 (122220120002221) 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, 147932525 + ... + 148756418.

It is an arithmetic number, because the mean of its divisors is an integer number (30555104275728).

Almost surely, 2^{122220120002021} is an apocalyptic number.

It is an amenable number.

122220120002021 is a deficient number, since it is larger than the sum of its proper divisors (297100891).

122220120002021 is an equidigital number, since it uses as much as digits as its factorization.

122220120002021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297100890.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 122220120002021 its reverse (120200021022221), we get a palindrome (242420141024242).

The spelling of 122220120002021 in words is "one hundred twenty-two trillion, two hundred twenty billion, one hundred twenty million, two thousand, twenty-one".