102002002021021 has 32 divisors (see below), whose sum is σ = 110722076467200. Its totient is φ = 93638577614400.

The previous prime is 102002002020967. The next prime is 102002002021063. The reversal of 102002002021021 is 120120200200201.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 102002002021021 - 2²⁷ = 102001867803293 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 102002002020992 and 102002002021010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102002002421021) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 691226196 + ... + 691373746.

It is an arithmetic number, because the mean of its divisors is an integer number (3460064889600).

Almost surely, 2^{102002002021021} is an apocalyptic number.

It is an amenable number.

102002002021021 is a deficient number, since it is larger than the sum of its proper divisors (8720074446179).

102002002021021 is a wasteful number, since it uses less digits than its factorization.

102002002021021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151609.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 102002002021021 its reverse (120120200200201), we get a palindrome (222122202221222).

The spelling of 102002002021021 in words is "one hundred two trillion, two billion, two million, twenty-one thousand, twenty-one".