399121102 has 4 divisors (see below), whose sum is σ = 598681656. Its totient is φ = 199560550.

The previous prime is 399121097. The next prime is 399121117. The reversal of 399121102 is 201121993.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99780274 + ... + 99780277.

It is an arithmetic number, because the mean of its divisors is an integer number (149670414).

Almost surely, 2^399121102 is an apocalyptic number.

399121102 is a deficient number, since it is larger than the sum of its proper divisors (199560554).

399121102 is a wasteful number, since it uses less digits than its factorization.

399121102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199560553.

The product of its (nonzero) digits is 972, while the sum is 28.

The square root of 399121102 is about 19978.0154670077. The cubic root of 399121102 is about 736.2662560126.

It can be divided in two parts, 39912 and 1102, that added together give a palindrome (41014).

The spelling of 399121102 in words is "three hundred ninety-nine million, one hundred twenty-one thousand, one hundred two".