102120202210121 has 4 divisors (see below), whose sum is σ = 102232299030144. Its totient is φ = 102008105390100.

The previous prime is 102120202210049. The next prime is 102120202210211. The reversal of 102120202210121 is 121012202021201.

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 a de Polignac number, because none of the positive numbers 2^k-102120202210121 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 102120202210121.

It is not an unprimeable number, because it can be changed into a prime (102120202215121) 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, 56048408645 + ... + 56048410466.

It is an arithmetic number, because the mean of its divisors is an integer number (25558074757536).

Almost surely, 2^{102120202210121} is an apocalyptic number.

It is an amenable number.

102120202210121 is a deficient number, since it is larger than the sum of its proper divisors (112096820023).

102120202210121 is an equidigital number, since it uses as much as digits as its factorization.

102120202210121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112096820022.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 102120202210121 its reverse (121012202021201), we get a palindrome (223132404231322).

The spelling of 102120202210121 in words is "one hundred two trillion, one hundred twenty billion, two hundred two million, two hundred ten thousand, one hundred twenty-one".