122220101100021 has 4 divisors (see below), whose sum is σ = 162960134800032. Its totient is φ = 81480067400012.

The previous prime is 122220101100001. The next prime is 122220101100023. The reversal of 122220101100021 is 120001101022221.

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 122220101100021 - 2⁷ = 122220101099893 is a prime.

It is a super-2 number, since 2×122220101100021² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122220101100023) 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, 20370016850001 + ... + 20370016850006.

It is an arithmetic number, because the mean of its divisors is an integer number (40740033700008).

Almost surely, 2^{122220101100021} is an apocalyptic number.

It is an amenable number.

122220101100021 is a deficient number, since it is larger than the sum of its proper divisors (40740033700011).

122220101100021 is an equidigital number, since it uses as much as digits as its factorization.

122220101100021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40740033700010.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 122220101100021 its reverse (120001101022221), we get a palindrome (242221202122242).

The spelling of 122220101100021 in words is "one hundred twenty-two trillion, two hundred twenty billion, one hundred one million, one hundred thousand, twenty-one".