21110202022100 has 36 divisors (see below), whose sum is σ = 45972160293948. Its totient is φ = 8414030688000.

The previous prime is 21110202022097. The next prime is 21110202022123. The reversal of 21110202022100 is 122020201112.

It can be written as a sum of positive squares in 6 ways, for example, as 1321957255696 + 19788244766404 = 1149764^2 + 4448398^2 .

It is a congruent number.

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, 375598271 + ... + 375654470.

Almost surely, 2^{21110202022100} is an apocalyptic number.

21110202022100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21110202022100 is an abundant number, since it is smaller than the sum of its proper divisors (24861958271848).

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

21110202022100 is a wasteful number, since it uses less digits than its factorization.

21110202022100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 751253036 (or 751253029 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21110202022100 its reverse (122020201112), we get a palindrome (21232222223212).

The spelling of 21110202022100 in words is "twenty-one trillion, one hundred ten billion, two hundred two million, twenty-two thousand, one hundred".