102003201021 has 16 divisors (see below), whose sum is σ = 136262736000. Its totient is φ = 67872977088.

The previous prime is 102003201019. The next prime is 102003201029. The reversal of 102003201021 is 120102300201.

It is not a de Polignac number, because 102003201021 - 2¹ = 102003201019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 102003200988 and 102003201006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102003201029) 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, 6725755 + ... + 6740903.

It is an arithmetic number, because the mean of its divisors is an integer number (8516421000).

Almost surely, 2^102003201021 is an apocalyptic number.

It is an amenable number.

102003201021 is a deficient number, since it is larger than the sum of its proper divisors (34259534979).

102003201021 is a wasteful number, since it uses less digits than its factorization.

102003201021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19268.

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 102003201021 its reverse (120102300201), we get a palindrome (222105501222).

The spelling of 102003201021 in words is "one hundred two billion, three million, two hundred one thousand, twenty-one".