399911120212 has 48 divisors (see below), whose sum is σ = 725653328400. Its totient is φ = 192614123520.

The previous prime is 399911120171. The next prime is 399911120237. The reversal of 399911120212 is 212021119993.

It can be written as a sum of positive squares in 8 ways, for example, as 243210730896 + 156700389316 = 493164^2 + 395854^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 128134012 + ... + 128137132.

It is an arithmetic number, because the mean of its divisors is an integer number (15117777675).

Almost surely, 2^399911120212 is an apocalyptic number.

It is an amenable number.

399911120212 is a deficient number, since it is larger than the sum of its proper divisors (325742208188).

399911120212 is a wasteful number, since it uses less digits than its factorization.

399911120212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5356 (or 5354 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 40.

The spelling of 399911120212 in words is "three hundred ninety-nine billion, nine hundred eleven million, one hundred twenty thousand, two hundred twelve".