21100122212010 has 32 divisors (see below), whose sum is σ = 53619134092992. Its totient is φ = 5295716947200.

The previous prime is 21100122211921. The next prime is 21100122212011. The reversal of 21100122212010 is 1021222100112.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (21100122212011) 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 15 ways as a sum of consecutive naturals, for example, 20686393816 + ... + 20686394835.

It is an arithmetic number, because the mean of its divisors is an integer number (1675597940406).

Almost surely, 2^{21100122212010} is an apocalyptic number.

21100122212010 is an abundant number, since it is smaller than the sum of its proper divisors (32519011880982).

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

21100122212010 is a wasteful number, since it uses less digits than its factorization.

21100122212010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41372788678.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21100122212010 its reverse (1021222100112), we get a palindrome (22121344312122).

The spelling of 21100122212010 in words is "twenty-one trillion, one hundred billion, one hundred twenty-two million, two hundred twelve thousand, ten".