121433863638 has 8 divisors (see below), whose sum is σ = 242867727288. Its totient is φ = 40477954544.

The previous prime is 121433863637. The next prime is 121433863643. The reversal of 121433863638 is 836368334121.

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

121433863638 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121433863637) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10119488631 + ... + 10119488642.

It is an arithmetic number, because the mean of its divisors is an integer number (30358465911).

Almost surely, 2^121433863638 is an apocalyptic number.

121433863638 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121433863638 is a wasteful number, since it uses less digits than its factorization.

121433863638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20238977278.

The product of its digits is 1492992, while the sum is 48.

The spelling of 121433863638 in words is "one hundred twenty-one billion, four hundred thirty-three million, eight hundred sixty-three thousand, six hundred thirty-eight".