120100101021 has 12 divisors (see below), whose sum is σ = 173483732448. Its totient is φ = 80064053064.

The previous prime is 120100101019. The next prime is 120100101041. The reversal of 120100101021 is 120101001021.

It is a happy number.

It is not a de Polignac number, because 120100101021 - 2¹ = 120100101019 is a prime.

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

It is a junction number, because it is equal to n+sod(n) for n = 120100100994 and 120100101012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120100101041) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 82326 + ... + 496968.

It is an arithmetic number, because the mean of its divisors is an integer number (14456977704).

Almost surely, 2^120100101021 is an apocalyptic number.

It is an amenable number.

120100101021 is a deficient number, since it is larger than the sum of its proper divisors (53383631427).

120100101021 is a wasteful number, since it uses less digits than its factorization.

120100101021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 446832 (or 446829 counting only the distinct ones).

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

Adding to 120100101021 its reverse (120101001021), we get a palindrome (240201102042).

The spelling of 120100101021 in words is "one hundred twenty billion, one hundred million, one hundred one thousand, twenty-one".