100102020521 has 16 divisors (see below), whose sum is σ = 101919225408. Its totient is φ = 98303846400.

The previous prime is 100102020511. The next prime is 100102020539. The reversal of 100102020521 is 125020201001.

It is a cyclic number.

It is not a de Polignac number, because 100102020521 - 2¹⁴ = 100102004137 is a prime.

It is a super-2 number, since 2×100102020521² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 100102020496 and 100102020505.

It is not an unprimeable number, because it can be changed into a prime (100102020511) 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, 6608126 + ... + 6623256.

It is an arithmetic number, because the mean of its divisors is an integer number (6369951588).

Almost surely, 2^100102020521 is an apocalyptic number.

It is an amenable number.

100102020521 is a deficient number, since it is larger than the sum of its proper divisors (1817204887).

100102020521 is a wasteful number, since it uses less digits than its factorization.

100102020521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15752.

The product of its (nonzero) digits is 40, while the sum is 14.

Adding to 100102020521 its reverse (125020201001), we get a palindrome (225122221522).

The spelling of 100102020521 in words is "one hundred billion, one hundred two million, twenty thousand, five hundred twenty-one".