101121201021 has 16 divisors (see below), whose sum is σ = 138483373248. Its totient is φ = 65586873600.

The previous prime is 101121201001. The next prime is 101121201053. The reversal of 101121201021 is 120102121101.

It is not a de Polignac number, because 101121201021 - 2⁵ = 101121200989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 101121200988 and 101121201006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101121201001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1744261 + ... + 1801301.

It is an arithmetic number, because the mean of its divisors is an integer number (8655210828).

Almost surely, 2^101121201021 is an apocalyptic number.

It is an amenable number.

101121201021 is a deficient number, since it is larger than the sum of its proper divisors (37362172227).

101121201021 is a wasteful number, since it uses less digits than its factorization.

101121201021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73052.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 101121201021 its reverse (120102121101), we get a palindrome (221223322122).

The spelling of 101121201021 in words is "one hundred one billion, one hundred twenty-one million, two hundred one thousand, twenty-one".