121399534 has 16 divisors (see below), whose sum is σ = 189421056. Its totient is φ = 58289400.

The previous prime is 121399519. The next prime is 121399547. The reversal of 121399534 is 435993121.

It is a junction number, because it is equal to n+sod(n) for n = 121399493 and 121399502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 649 + ... + 15595.

It is an arithmetic number, because the mean of its divisors is an integer number (11838816).

Almost surely, 2^121399534 is an apocalyptic number.

121399534 is a deficient number, since it is larger than the sum of its proper divisors (68021522).

121399534 is a wasteful number, since it uses less digits than its factorization.

121399534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15111.

The product of its digits is 29160, while the sum is 37.

The square root of 121399534 is about 11018.1456697577. The cubic root of 121399534 is about 495.1525347008.

The spelling of 121399534 in words is "one hundred twenty-one million, three hundred ninety-nine thousand, five hundred thirty-four".