102120120211021 has 4 divisors (see below), whose sum is σ = 111403767502944. Its totient is φ = 92836472919100.

The previous prime is 102120120211009. The next prime is 102120120211027. The reversal of 102120120211021 is 120112021021201.

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 102120120211021 - 2⁵ = 102120120210989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102120120210986 and 102120120211004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102120120211027) 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, 4641823645945 + ... + 4641823645966.

It is an arithmetic number, because the mean of its divisors is an integer number (27850941875736).

Almost surely, 2^{102120120211021} is an apocalyptic number.

102120120211021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

102120120211021 is a deficient number, since it is larger than the sum of its proper divisors (9283647291923).

102120120211021 is an equidigital number, since it uses as much as digits as its factorization.

102120120211021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9283647291922.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 102120120211021 its reverse (120112021021201), we get a palindrome (222232141232222).

The spelling of 102120120211021 in words is "one hundred two trillion, one hundred twenty billion, one hundred twenty million, two hundred eleven thousand, twenty-one".