212021120110100 has 54 divisors (see below), whose sum is σ = 535201884633150. Its totient is φ = 72692955464640.

The previous prime is 212021120109979. The next prime is 212021120110127. The reversal of 212021120110100 is 1011021120212.

It can be written as a sum of positive squares in 3 ways, for example, as 20792159064964 + 191228961045136 = 4559842^2 + 13828556^2 .

It is a super-2 number, since 2×212021120110100² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 21634803275 + ... + 21634813074.

It is an arithmetic number, because the mean of its divisors is an integer number (9911146011725).

Almost surely, 2^{212021120110100} is an apocalyptic number.

212021120110100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212021120110100 is an abundant number, since it is smaller than the sum of its proper divisors (323180764523050).

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

212021120110100 is a wasteful number, since it uses less digits than its factorization.

212021120110100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43269616377 (or 43269616363 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 212021120110100 its reverse (1011021120212), we get a palindrome (213032141230312).

The spelling of 212021120110100 in words is "two hundred twelve trillion, twenty-one billion, one hundred twenty million, one hundred ten thousand, one hundred".