20100012210 has 48 divisors (see below), whose sum is σ = 52267362264. Its totient is φ = 5359251456.

The previous prime is 20100012181. The next prime is 20100012211. The reversal of 20100012210 is 1221000102.

It can be written as a sum of positive squares in 4 ways, for example, as 15536874609 + 4563137601 = 124647^2 + 67551^2 .

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 20100012192 and 20100012201.

It is not an unprimeable number, because it can be changed into a prime (20100012211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 977394 + ... + 997746.

Almost surely, 2^20100012210 is an apocalyptic number.

20100012210 is an abundant number, since it is smaller than the sum of its proper divisors (32167350054).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20100012210 is a wasteful number, since it uses less digits than its factorization.

20100012210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31339 (or 31336 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 20100012210 its reverse (1221000102), we get a palindrome (21321012312).

The spelling of 20100012210 in words is "twenty billion, one hundred million, twelve thousand, two hundred ten".