120100000101021 has 48 divisors (see below), whose sum is σ = 181302496981632. Its totient is φ = 76466141136000.

The previous prime is 120100000101019. The next prime is 120100000101143. The reversal of 120100000101021 is 120101000001021.

It is a happy number.

It is not a de Polignac number, because 120100000101021 - 2¹ = 120100000101019 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 = 120100000100994 and 120100000101012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120100000102021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1185618651 + ... + 1185719943.

It is an arithmetic number, because the mean of its divisors is an integer number (3777135353784).

Almost surely, 2^{120100000101021} is an apocalyptic number.

It is an amenable number.

120100000101021 is a deficient number, since it is larger than the sum of its proper divisors (61202496880611).

120100000101021 is a wasteful number, since it uses less digits than its factorization.

120100000101021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110194 (or 110191 counting only the distinct ones).

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

Adding to 120100000101021 its reverse (120101000001021), we get a palindrome (240201000102042).

The spelling of 120100000101021 in words is "one hundred twenty trillion, one hundred billion, one hundred one thousand, twenty-one".