102021010221 has 16 divisors (see below), whose sum is σ = 146565840960. Its totient is φ = 62750388480.

The previous prime is 102021010187. The next prime is 102021010367. The reversal of 102021010221 is 122010120201.

It is not a de Polignac number, because 102021010221 - 2¹⁹ = 102020485933 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 102021010197 and 102021010206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102021010121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 583740 + ... + 738101.

It is an arithmetic number, because the mean of its divisors is an integer number (9160365060).

Almost surely, 2^102021010221 is an apocalyptic number.

It is an amenable number.

102021010221 is a deficient number, since it is larger than the sum of its proper divisors (44544830739).

102021010221 is a wasteful number, since it uses less digits than its factorization.

102021010221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1323836.

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

Adding to 102021010221 its reverse (122010120201), we get a palindrome (224031130422).

The spelling of 102021010221 in words is "one hundred two billion, twenty-one million, ten thousand, two hundred twenty-one".