121353861 has 8 divisors (see below), whose sum is σ = 162358560. Its totient is φ = 80625872.

The previous prime is 121353853. The next prime is 121353877. The reversal of 121353861 is 168353121.

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

It is a cyclic number.

It is not a de Polignac number, because 121353861 - 2³ = 121353853 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121353061) 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, 68151 + ... + 69908.

It is an arithmetic number, because the mean of its divisors is an integer number (20294820).

Almost surely, 2^121353861 is an apocalyptic number.

It is an amenable number.

121353861 is a deficient number, since it is larger than the sum of its proper divisors (41004699).

121353861 is a wasteful number, since it uses less digits than its factorization.

121353861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138355.

The product of its digits is 4320, while the sum is 30.

The square root of 121353861 is about 11016.0728483430. The cubic root of 121353861 is about 495.0904313916.

The spelling of 121353861 in words is "one hundred twenty-one million, three hundred fifty-three thousand, eight hundred sixty-one".