102002120001 has 12 divisors (see below), whose sum is σ = 147478215040. Its totient is φ = 67935958200.

The previous prime is 102002119979. The next prime is 102002120041. The reversal of 102002120001 is 100021200201.

It is not a de Polignac number, because 102002120001 - 2⁷ = 102002119873 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (102002120041) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5444725 + ... + 5463426.

Almost surely, 2^102002120001 is an apocalyptic number.

It is an amenable number.

102002120001 is a deficient number, since it is larger than the sum of its proper divisors (45476095039).

102002120001 is a wasteful number, since it uses less digits than its factorization.

102002120001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10909196 (or 10909193 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 102002120001 its reverse (100021200201), we get a palindrome (202023320202).

The spelling of 102002120001 in words is "one hundred two billion, two million, one hundred twenty thousand, one".