212100001212 has 72 divisors (see below), whose sum is σ = 549367325136. Its totient is φ = 63636320000.

The previous prime is 212100001207. The next prime is 212100001303.

212100001212 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (12).

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, 576489 + ... + 869792.

It is an arithmetic number, because the mean of its divisors is an integer number (7630101738).

Almost surely, 2^212100001212 is an apocalyptic number.

212100001212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

212100001212 is an abundant number, since it is smaller than the sum of its proper divisors (337267323924).

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

212100001212 is a wasteful number, since it uses less digits than its factorization.

212100001212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1446411 (or 1446398 counting only the distinct ones).

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

It can be divided in two parts, 21210000 and 1212, that added together give a palindrome (21211212).

The spelling of 212100001212 in words is "two hundred twelve billion, one hundred million, one thousand, two hundred twelve".