102121220110001 has 4 divisors (see below), whose sum is σ = 102121383276900. Its totient is φ = 102121056943104.

The previous prime is 102121220109973. The next prime is 102121220110123. The reversal of 102121220110001 is 100011022121201.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 32493477093025 + 69627743016976 = 5700305^2 + 8344324^2 .

It is a cyclic number.

It is not a de Polignac number, because 102121220110001 - 2³⁸ = 101846342203057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102121220116001) 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, 80641016 + ... + 81897593.

It is an arithmetic number, because the mean of its divisors is an integer number (25530345819225).

Almost surely, 2^{102121220110001} is an apocalyptic number.

It is an amenable number.

102121220110001 is a deficient number, since it is larger than the sum of its proper divisors (163166899).

102121220110001 is an equidigital number, since it uses as much as digits as its factorization.

102121220110001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163166898.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 102121220110001 its reverse (100011022121201), we get a palindrome (202132242231202).

The spelling of 102121220110001 in words is "one hundred two trillion, one hundred twenty-one billion, two hundred twenty million, one hundred ten thousand, one".