120102122100021 has 4 divisors (see below), whose sum is σ = 160136162800032. Its totient is φ = 80068081400012.

The previous prime is 120102122100017. The next prime is 120102122100043. The reversal of 120102122100021 is 120001221201021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 120102122100021 - 2² = 120102122100017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120102122100221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20017020350001 + ... + 20017020350006.

It is an arithmetic number, because the mean of its divisors is an integer number (40034040700008).

Almost surely, 2^{120102122100021} is an apocalyptic number.

It is an amenable number.

120102122100021 is a deficient number, since it is larger than the sum of its proper divisors (40034040700011).

120102122100021 is an equidigital number, since it uses as much as digits as its factorization.

120102122100021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40034040700010.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 120102122100021 its reverse (120001221201021), we get a palindrome (240103343301042).

The spelling of 120102122100021 in words is "one hundred twenty trillion, one hundred two billion, one hundred twenty-two million, one hundred thousand, twenty-one".