101122202122021 has 4 divisors (see below), whose sum is σ = 102164699051212. Its totient is φ = 100079705192832.

The previous prime is 101122202122009. The next prime is 101122202122063. The reversal of 101122202122021 is 120221202221101.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 81459451689121 + 19662750432900 = 9025489^2 + 4434270^2 .

It is a cyclic number.

It is not a de Polignac number, because 101122202122021 - 2²¹ = 101122200024869 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 101122202122021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101122205122021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 521248464450 + ... + 521248464643.

It is an arithmetic number, because the mean of its divisors is an integer number (25541174762803).

Almost surely, 2^{101122202122021} is an apocalyptic number.

It is an amenable number.

101122202122021 is a deficient number, since it is larger than the sum of its proper divisors (1042496929191).

101122202122021 is an equidigital number, since it uses as much as digits as its factorization.

101122202122021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1042496929190.

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

Adding to 101122202122021 its reverse (120221202221101), we get a palindrome (221343404343122).

The spelling of 101122202122021 in words is "one hundred one trillion, one hundred twenty-two billion, two hundred two million, one hundred twenty-two thousand, twenty-one".