102002121021 has 8 divisors (see below), whose sum is σ = 141915994560. Its totient is φ = 65044830752.

The previous prime is 102002120999. The next prime is 102002121049. The reversal of 102002121021 is 120121200201.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 102002121021 - 2¹³ = 102002112829 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 102002120988 and 102002121006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102002121061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 739145736 + ... + 739145873.

It is an arithmetic number, because the mean of its divisors is an integer number (17739499320).

Almost surely, 2^102002121021 is an apocalyptic number.

It is an amenable number.

102002121021 is a deficient number, since it is larger than the sum of its proper divisors (39913873539).

102002121021 is a wasteful number, since it uses less digits than its factorization.

102002121021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1478291635.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 102002121021 its reverse (120121200201), we get a palindrome (222123321222).

The spelling of 102002121021 in words is "one hundred two billion, two million, one hundred twenty-one thousand, twenty-one".