120120210000021 has 64 divisors (see below), whose sum is σ = 200480368435200. Its totient is φ = 62150584478400.

The previous prime is 120120209999987. The next prime is 120120210000053. The reversal of 120120210000021 is 120000012021021.

It is not a de Polignac number, because 120120210000021 - 2⁹ = 120120209999509 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 120120209999961 and 120120210000006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120120210000221) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 58909926 + ... + 60914856.

It is an arithmetic number, because the mean of its divisors is an integer number (3132505756800).

Almost surely, 2^{120120210000021} is an apocalyptic number.

120120210000021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

120120210000021 is a deficient number, since it is larger than the sum of its proper divisors (80360158435179).

120120210000021 is a wasteful number, since it uses less digits than its factorization.

120120210000021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2005990.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 120120210000021 its reverse (120000012021021), we get a palindrome (240120222021042).

The spelling of 120120210000021 in words is "one hundred twenty trillion, one hundred twenty billion, two hundred ten million, twenty-one", and thus it is an aban number.