212001100100 has 18 divisors (see below), whose sum is σ = 460042387434. Its totient is φ = 84800440000.

The previous prime is 212001100081. The next prime is 212001100139. The reversal of 212001100100 is 1001100212.

It can be written as a sum of positive squares in 3 ways, for example, as 54239615236 + 157761484864 = 232894^2 + 397192^2 .

It is a super-2 number, since 2×212001100100² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1060005401 + ... + 1060005600.

It is an arithmetic number, because the mean of its divisors is an integer number (25557910413).

Almost surely, 2^212001100100 is an apocalyptic number.

212001100100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212001100100 is an abundant number, since it is smaller than the sum of its proper divisors (248041287334).

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

212001100100 is a wasteful number, since it uses less digits than its factorization.

212001100100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2120011015 (or 2120011008 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 212001100100 its reverse (1001100212), we get a palindrome (213002200312).

The spelling of 212001100100 in words is "two hundred twelve billion, one million, one hundred thousand, one hundred".