399621122511 has 16 divisors (see below), whose sum is σ = 587159481216. Its totient is φ = 240201603936.

The previous prime is 399621122497. The next prime is 399621122531. The reversal of 399621122511 is 115221126993.

It is not a de Polignac number, because 399621122511 - 2⁵ = 399621122479 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399621122531) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 119145945 + ... + 119149298.

It is an arithmetic number, because the mean of its divisors is an integer number (36697467576).

Almost surely, 2^399621122511 is an apocalyptic number.

399621122511 is a deficient number, since it is larger than the sum of its proper divisors (187538358705).

399621122511 is a wasteful number, since it uses less digits than its factorization.

399621122511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238295302.

The product of its digits is 58320, while the sum is 42.

The spelling of 399621122511 in words is "three hundred ninety-nine billion, six hundred twenty-one million, one hundred twenty-two thousand, five hundred eleven".