100121012210 has 16 divisors (see below), whose sum is σ = 180244599192. Its totient is φ = 40042454400.

The previous prime is 100121012207. The next prime is 100121012239. The reversal of 100121012210 is 12210121001.

It can be written as a sum of positive squares in 4 ways, for example, as 99005251801 + 1115760409 = 314651^2 + 33403^2 .

It is a junction number, because it is equal to n+sod(n) for n = 100121012191 and 100121012200.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 672821 + ... + 808040.

Almost surely, 2^100121012210 is an apocalyptic number.

100121012210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

100121012210 is a deficient number, since it is larger than the sum of its proper divisors (80123586982).

100121012210 is a wasteful number, since it uses less digits than its factorization.

100121012210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1487629.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 100121012210 its reverse (12210121001), we get a palindrome (112331133211).

The spelling of 100121012210 in words is "one hundred billion, one hundred twenty-one million, twelve thousand, two hundred ten".