20100122210 has 32 divisors (see below), whose sum is σ = 43781109120. Its totient is φ = 6486089472.

The previous prime is 20100122197. The next prime is 20100122243. The reversal of 20100122210 is 1222100102.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20100122191 and 20100122200.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8444240 + ... + 8446619.

It is an arithmetic number, because the mean of its divisors is an integer number (1368159660).

Almost surely, 2^20100122210 is an apocalyptic number.

20100122210 is an abundant number, since it is smaller than the sum of its proper divisors (23680986910).

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

20100122210 is a wasteful number, since it uses less digits than its factorization.

20100122210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16890890.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 20100122210 its reverse (1222100102), we get a palindrome (21322222312).

The spelling of 20100122210 in words is "twenty billion, one hundred million, one hundred twenty-two thousand, two hundred ten".