102002060721 has 16 divisors (see below), whose sum is σ = 151817022720. Its totient is φ = 60381768720.

The previous prime is 102002060711. The next prime is 102002060759. The reversal of 102002060721 is 127060200201.

It is not a de Polignac number, because 102002060721 - 2²² = 101997866417 is a prime.

It is not an unprimeable number, because it can be changed into a prime (102002060701) 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, 35940111 + ... + 35942948.

It is an arithmetic number, because the mean of its divisors is an integer number (9488563920).

Almost surely, 2^102002060721 is an apocalyptic number.

102002060721 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

102002060721 is a deficient number, since it is larger than the sum of its proper divisors (49814961999).

102002060721 is a wasteful number, since it uses less digits than its factorization.

102002060721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71883116.

The product of its (nonzero) digits is 336, while the sum is 21.

Adding to 102002060721 its reverse (127060200201), we get a palindrome (229062260922).

The spelling of 102002060721 in words is "one hundred two billion, two million, sixty thousand, seven hundred twenty-one".