121261990413 has 8 divisors (see below), whose sum is σ = 161833904800. Its totient is φ = 80765701488.

The previous prime is 121261990411. The next prime is 121261990429. The reversal of 121261990413 is 314099162121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 121261990413 - 2¹ = 121261990411 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121261990411) 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, 18902623 + ... + 18909036.

It is an arithmetic number, because the mean of its divisors is an integer number (20229238100).

Almost surely, 2^121261990413 is an apocalyptic number.

It is an amenable number.

121261990413 is a deficient number, since it is larger than the sum of its proper divisors (40571914387).

121261990413 is a wasteful number, since it uses less digits than its factorization.

121261990413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37812731.

The product of its (nonzero) digits is 23328, while the sum is 39.

The spelling of 121261990413 in words is "one hundred twenty-one billion, two hundred sixty-one million, nine hundred ninety thousand, four hundred thirteen".