121617523401 has 8 divisors (see below), whose sum is σ = 176898215904. Its totient is φ = 73707589920.

The previous prime is 121617523343. The next prime is 121617523411. The reversal of 121617523401 is 104325716121.

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

It is not a de Polignac number, because 121617523401 - 2⁹ = 121617522889 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33), and also a Moran number because the ratio is a prime number: 3685379497 = 121617523401 / (1 + 2 + 1 + 6 + 1 + 7 + 5 + 2 + 3 + 4 + 0 + 1).

It is not an unprimeable number, because it can be changed into a prime (121617523411) 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, 1842689716 + ... + 1842689781.

It is an arithmetic number, because the mean of its divisors is an integer number (22112276988).

Almost surely, 2^121617523401 is an apocalyptic number.

121617523401 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121617523401 is a deficient number, since it is larger than the sum of its proper divisors (55280692503).

121617523401 is a wasteful number, since it uses less digits than its factorization.

121617523401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3685379511.

The product of its (nonzero) digits is 10080, while the sum is 33.

The spelling of 121617523401 in words is "one hundred twenty-one billion, six hundred seventeen million, five hundred twenty-three thousand, four hundred one".