120100002021 has 16 divisors (see below), whose sum is σ = 178587374400. Its totient is φ = 79769017584.

The previous prime is 120100002019. The next prime is 120100002053. The reversal of 120100002021 is 120200001021.

It is not a de Polignac number, because 120100002021 - 2¹ = 120100002019 is a prime.

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 120100001994 and 120100002012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120100002521) 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, 8260671 + ... + 8275196.

It is an arithmetic number, because the mean of its divisors is an integer number (11161710900).

Almost surely, 2^120100002021 is an apocalyptic number.

It is an amenable number.

120100002021 is a deficient number, since it is larger than the sum of its proper divisors (58487372379).

120100002021 is a wasteful number, since it uses less digits than its factorization.

120100002021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16536145 (or 16536139 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 120100002021 its reverse (120200001021), we get a palindrome (240300003042).

The spelling of 120100002021 in words is "one hundred twenty billion, one hundred million, two thousand, twenty-one".