102102120120021 has 8 divisors (see below), whose sum is σ = 155584183040064. Its totient is φ = 58344068640000.

The previous prime is 102102120119983. The next prime is 102102120120083. The reversal of 102102120120021 is 120021021201201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 102102120120021 - 2⁷ = 102102120119893 is a prime.

It is a super-3 number, since 3×102102120120021³ (a number of 43 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102102120110021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2431002859980 + ... + 2431002860021.

It is an arithmetic number, because the mean of its divisors is an integer number (19448022880008).

Almost surely, 2^{102102120120021} is an apocalyptic number.

It is an amenable number.

102102120120021 is a deficient number, since it is larger than the sum of its proper divisors (53482062920043).

102102120120021 is an equidigital number, since it uses as much as digits as its factorization.

102102120120021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4862005720011.

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

Adding to 102102120120021 its reverse (120021021201201), we get a palindrome (222123141321222).

The spelling of 102102120120021 in words is "one hundred two trillion, one hundred two billion, one hundred twenty million, one hundred twenty thousand, twenty-one".