21100211022 has 64 divisors (see below), whose sum is σ = 46266105600. Its totient is φ = 6362254080.

The previous prime is 21100211009. The next prime is 21100211029. The reversal of 21100211022 is 22011200112.

It is a junction number, because it is equal to n+sod(n) for n = 21100210989 and 21100211007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21100211029) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14765004 + ... + 14766432.

It is an arithmetic number, because the mean of its divisors is an integer number (722907900).

Almost surely, 2^21100211022 is an apocalyptic number.

21100211022 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21100211022 is an abundant number, since it is smaller than the sum of its proper divisors (25165894578).

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

21100211022 is a wasteful number, since it uses less digits than its factorization.

21100211022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2401.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 21100211022 its reverse (22011200112), we get a palindrome (43111411134).

The spelling of 21100211022 in words is "twenty-one billion, one hundred million, two hundred eleven thousand, twenty-two".