100102021221 has 32 divisors (see below), whose sum is σ = 139201485696. Its totient is φ = 63931680000.

The previous prime is 100102021219. The next prime is 100102021259. The reversal of 100102021221 is 122120201001.

It is not a de Polignac number, because 100102021221 - 2¹ = 100102021219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 100102021197 and 100102021206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100102021211) 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, 2004526 + ... + 2053856.

It is an arithmetic number, because the mean of its divisors is an integer number (4350046428).

Almost surely, 2^100102021221 is an apocalyptic number.

It is an amenable number.

100102021221 is a deficient number, since it is larger than the sum of its proper divisors (39099464475).

100102021221 is a wasteful number, since it uses less digits than its factorization.

100102021221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49653.

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

Adding to 100102021221 its reverse (122120201001), we get a palindrome (222222222222).

The spelling of 100102021221 in words is "one hundred billion, one hundred two million, twenty-one thousand, two hundred twenty-one".