120110001021 has 48 divisors (see below), whose sum is σ = 175950448128. Its totient is φ = 78949533600.

The previous prime is 120110001007. The next prime is 120110001079. The reversal of 120110001021 is 120100011021.

It is a happy number.

It is not a de Polignac number, because 120110001021 - 2¹¹ = 120109998973 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 = 120110000994 and 120110001012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120110001721) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 148100706 + ... + 148101516.

It is an arithmetic number, because the mean of its divisors is an integer number (3665634336).

Almost surely, 2^120110001021 is an apocalyptic number.

It is an amenable number.

120110001021 is a deficient number, since it is larger than the sum of its proper divisors (55840447107).

120110001021 is a wasteful number, since it uses less digits than its factorization.

120110001021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1662 (or 1659 counting only the distinct ones).

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

Adding to 120110001021 its reverse (120100011021), we get a palindrome (240210012042).

The spelling of 120110001021 in words is "one hundred twenty billion, one hundred ten million, one thousand, twenty-one".