101220023121 has 64 divisors (see below), whose sum is σ = 160194682368. Its totient is φ = 55659921408.

The previous prime is 101220023083. The next prime is 101220023171. The reversal of 101220023121 is 121320022101.

It is not a de Polignac number, because 101220023121 - 2⁷ = 101220022993 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 101220023121.

It is not an unprimeable number, because it can be changed into a prime (101220023171) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 12195445 + ... + 12203741.

It is an arithmetic number, because the mean of its divisors is an integer number (2503041912).

Almost surely, 2^101220023121 is an apocalyptic number.

It is an amenable number.

101220023121 is a deficient number, since it is larger than the sum of its proper divisors (58974659247).

101220023121 is a wasteful number, since it uses less digits than its factorization.

101220023121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8570.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 101220023121 its reverse (121320022101), we get a palindrome (222540045222).

The spelling of 101220023121 in words is "one hundred one billion, two hundred twenty million, twenty-three thousand, one hundred twenty-one".