101220122121 has 4 divisors (see below), whose sum is σ = 134960162832. Its totient is φ = 67480081412.

The previous prime is 101220122119. The next prime is 101220122141. The reversal of 101220122121 is 121221022101.

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 101220122121 - 2¹ = 101220122119 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 101220122121.

It is not an unprimeable number, because it can be changed into a prime (101220122141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16870020351 + ... + 16870020356.

It is an arithmetic number, because the mean of its divisors is an integer number (33740040708).

Almost surely, 2^101220122121 is an apocalyptic number.

It is an amenable number.

101220122121 is a deficient number, since it is larger than the sum of its proper divisors (33740040711).

101220122121 is an equidigital number, since it uses as much as digits as its factorization.

101220122121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33740040710.

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

Adding to 101220122121 its reverse (121221022101), we get a palindrome (222441144222).

The spelling of 101220122121 in words is "one hundred one billion, two hundred twenty million, one hundred twenty-two thousand, one hundred twenty-one".