212400100244 has 12 divisors (see below), whose sum is σ = 371707449204. Its totient is φ = 106197971904.

The previous prime is 212400100219. The next prime is 212400100271. The reversal of 212400100244 is 442001004212.

It can be written as a sum of positive squares in 2 ways, for example, as 68022899344 + 144377200900 = 260812^2 + 379970^2 .

It is a super-2 number, since 2×212400100244² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 277019 + ... + 708194.

It is an arithmetic number, because the mean of its divisors is an integer number (30975620767).

Almost surely, 2^212400100244 is an apocalyptic number.

It is an amenable number.

212400100244 is a deficient number, since it is larger than the sum of its proper divisors (159307348960).

212400100244 is a wasteful number, since it uses less digits than its factorization.

212400100244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1039114 (or 1039112 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 212400100244 its reverse (442001004212), we get a palindrome (654401104456).

The spelling of 212400100244 in words is "two hundred twelve billion, four hundred million, one hundred thousand, two hundred forty-four".