121363638 has 16 divisors (see below), whose sum is σ = 264793536. Its totient is φ = 36776840.

The previous prime is 121363633. The next prime is 121363643. The reversal of 121363638 is 836363121.

It is an interprime number because it is at equal distance from previous prime (121363633) and next prime (121363643).

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 121363599 and 121363608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121363633) 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, 919356 + ... + 919487.

It is an arithmetic number, because the mean of its divisors is an integer number (16549596).

Almost surely, 2^121363638 is an apocalyptic number.

121363638 is an abundant number, since it is smaller than the sum of its proper divisors (143429898).

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

121363638 is a wasteful number, since it uses less digits than its factorization.

121363638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1838859.

The product of its digits is 15552, while the sum is 33.

The square root of 121363638 is about 11016.5166000873. The cubic root of 121363638 is about 495.1037268597.

The spelling of 121363638 in words is "one hundred twenty-one million, three hundred sixty-three thousand, six hundred thirty-eight".