121390959436 has 24 divisors (see below), whose sum is σ = 214449016320. Its totient is φ = 60119968272.

The previous prime is 121390959421. The next prime is 121390959439. The reversal of 121390959436 is 634959093121.

It is not an unprimeable number, because it can be changed into a prime (121390959439) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4127961 + ... + 4157263.

It is an arithmetic number, because the mean of its divisors is an integer number (8935375680).

Almost surely, 2^121390959436 is an apocalyptic number.

It is an amenable number.

121390959436 is a deficient number, since it is larger than the sum of its proper divisors (93058056884).

121390959436 is a wasteful number, since it uses less digits than its factorization.

121390959436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39093 (or 39091 counting only the distinct ones).

The product of its (nonzero) digits is 1574640, while the sum is 52.

The spelling of 121390959436 in words is "one hundred twenty-one billion, three hundred ninety million, nine hundred fifty-nine thousand, four hundred thirty-six".