212100121332 has 72 divisors (see below), whose sum is σ = 585370461312. Its totient is φ = 64219104000.

The previous prime is 212100121319. The next prime is 212100121379. The reversal of 212100121332 is 233121001212.

212100121332 is a `hidden beast` number, since 2 + 1 + 210 + 0 + 121 + 332 = 666.

It is a super-2 number, since 2×212100121332² (a number of 23 digits) contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 252613 + ... + 698579.

It is an arithmetic number, because the mean of its divisors is an integer number (8130145296).

Almost surely, 2^212100121332 is an apocalyptic number.

212100121332 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

212100121332 is an abundant number, since it is smaller than the sum of its proper divisors (373270339980).

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

212100121332 is a wasteful number, since it uses less digits than its factorization.

212100121332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 447189 (or 447184 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 212100121332 its reverse (233121001212), we get a palindrome (445221122544).

The spelling of 212100121332 in words is "two hundred twelve billion, one hundred million, one hundred twenty-one thousand, three hundred thirty-two".