121231194436 has 12 divisors (see below), whose sum is σ = 231441371280. Its totient is φ = 55105088360.

The previous prime is 121231194407. The next prime is 121231194449. The reversal of 121231194436 is 634491132121.

It is a junction number, because it is equal to n+sod(n) for n = 121231194395 and 121231194404.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1377627166 + ... + 1377627253.

It is an arithmetic number, because the mean of its divisors is an integer number (19286780940).

Almost surely, 2^121231194436 is an apocalyptic number.

It is an amenable number.

121231194436 is a deficient number, since it is larger than the sum of its proper divisors (110210176844).

121231194436 is a wasteful number, since it uses less digits than its factorization.

121231194436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2755254434 (or 2755254432 counting only the distinct ones).

The product of its digits is 31104, while the sum is 37.

The spelling of 121231194436 in words is "one hundred twenty-one billion, two hundred thirty-one million, one hundred ninety-four thousand, four hundred thirty-six".