102201021021 has 16 divisors (see below), whose sum is σ = 148665646080. Its totient is φ = 61936006320.

The previous prime is 102201021007. The next prime is 102201021047. The reversal of 102201021021 is 120120102201.

It is not a de Polignac number, because 102201021021 - 2⁷ = 102201020893 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 102201020988 and 102201021006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102201021521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 465420 + ... + 648858.

It is an arithmetic number, because the mean of its divisors is an integer number (9291602880).

Almost surely, 2^102201021021 is an apocalyptic number.

102201021021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

102201021021 is a deficient number, since it is larger than the sum of its proper divisors (46464625059).

102201021021 is a wasteful number, since it uses less digits than its factorization.

102201021021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200336.

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

Adding to 102201021021 its reverse (120120102201), we get a palindrome (222321123222).

The spelling of 102201021021 in words is "one hundred two billion, two hundred one million, twenty-one thousand, twenty-one".