102121021001 has 16 divisors (see below), whose sum is σ = 110843691840. Its totient is φ = 93777128640.

The previous prime is 102121020983. The next prime is 102121021003. The reversal of 102121021001 is 100120121201.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102121021001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (102121021003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 527330 + ... + 694491.

It is an arithmetic number, because the mean of its divisors is an integer number (6927730740).

Almost surely, 2^102121021001 is an apocalyptic number.

It is an amenable number.

102121021001 is a deficient number, since it is larger than the sum of its proper divisors (8722670839).

102121021001 is a wasteful number, since it uses less digits than its factorization.

102121021001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1221976.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 102121021001 its reverse (100120121201), we get a palindrome (202241142202).

The spelling of 102121021001 in words is "one hundred two billion, one hundred twenty-one million, twenty-one thousand, one".