101010020121 has 24 divisors (see below), whose sum is σ = 147391914176. Its totient is φ = 66653629920.

The previous prime is 101010020119. The next prime is 101010020149. The reversal of 101010020121 is 121020010101.

It is a happy number.

It is not a de Polignac number, because 101010020121 - 2¹ = 101010020119 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (101010020821) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1949871 + ... + 2001003.

Almost surely, 2^101010020121 is an apocalyptic number.

It is an amenable number.

101010020121 is a deficient number, since it is larger than the sum of its proper divisors (46381894055).

101010020121 is a wasteful number, since it uses less digits than its factorization.

101010020121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53373 (or 53370 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 101010020121 its reverse (121020010101), we get a palindrome (222030030222).

The spelling of 101010020121 in words is "one hundred one billion, ten million, twenty thousand, one hundred twenty-one".