401108820999 has 4 divisors (see below), whose sum is σ = 534811761336. Its totient is φ = 267405880664.

The previous prime is 401108820991. The next prime is 401108821033. The reversal of 401108820999 is 999028801104.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 401108820999 - 2³ = 401108820991 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401108820991) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66851470164 + ... + 66851470169.

It is an arithmetic number, because the mean of its divisors is an integer number (133702940334).

Almost surely, 2^401108820999 is an apocalyptic number.

401108820999 is a deficient number, since it is larger than the sum of its proper divisors (133702940337).

401108820999 is a wasteful number, since it uses less digits than its factorization.

401108820999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133702940336.

The product of its (nonzero) digits is 373248, while the sum is 51.

The spelling of 401108820999 in words is "four hundred one billion, one hundred eight million, eight hundred twenty thousand, nine hundred ninety-nine".