120102010021 has 6 divisors (see below), whose sum is σ = 139710501510. Its totient is φ = 102944579976.

The previous prime is 120102009919. The next prime is 120102010087. The reversal of 120102010021 is 120010201021.

It can be written as a sum of positive squares in only one way, i.e., 114439447521 + 5662562500 = 338289^2 + 75250^2 .

It is not a de Polignac number, because 120102010021 - 2¹⁹ = 120101485733 is a prime.

It is a super-2 number, since 2×120102010021² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120102019021) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1225530666 + ... + 1225530763.

It is an arithmetic number, because the mean of its divisors is an integer number (23285083585).

Almost surely, 2^120102010021 is an apocalyptic number.

It is an amenable number.

120102010021 is a deficient number, since it is larger than the sum of its proper divisors (19608491489).

120102010021 is an equidigital number, since it uses as much as digits as its factorization.

120102010021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2451061443 (or 2451061436 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 120102010021 its reverse (120010201021), we get a palindrome (240112211042).

The spelling of 120102010021 in words is "one hundred twenty billion, one hundred two million, ten thousand, twenty-one".