100121222121210 has 24 divisors (see below), whose sum is σ = 260315177515380. Its totient is φ = 26698992565632.

The previous prime is 100121222121203. The next prime is 100121222121229. The reversal of 100121222121210 is 12121222121001.

100121222121210 is a `hidden beast` number, since 1 + 0 + 0 + 1 + 212 + 221 + 21 + 210 = 666.

100121222121210 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 97342829865009 + 2778392256201 = 9866247^2 + 1666851^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 556229011695 + ... + 556229011874.

Almost surely, 2^{100121222121210} is an apocalyptic number.

100121222121210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

100121222121210 is an abundant number, since it is smaller than the sum of its proper divisors (160193955394170).

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

100121222121210 is a wasteful number, since it uses less digits than its factorization.

100121222121210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1112458023582 (or 1112458023579 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 100121222121210 its reverse (12121222121001), we get a palindrome (112242444242211).

The spelling of 100121222121210 in words is "one hundred trillion, one hundred twenty-one billion, two hundred twenty-two million, one hundred twenty-one thousand, two hundred ten".