121619201 has 4 divisors (see below), whose sum is σ = 132675504. Its totient is φ = 110562900.

The previous prime is 121619191. The next prime is 121619219. The reversal of 121619201 is 102916121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121619201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121619401) 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, 5528135 + ... + 5528156.

It is an arithmetic number, because the mean of its divisors is an integer number (33168876).

Almost surely, 2^121619201 is an apocalyptic number.

121619201 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121619201 is a deficient number, since it is larger than the sum of its proper divisors (11056303).

121619201 is a wasteful number, since it uses less digits than its factorization.

121619201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11056302.

The product of its (nonzero) digits is 216, while the sum is 23.

The square root of 121619201 is about 11028.1095841490. The cubic root of 121619201 is about 495.4510068342.

The spelling of 121619201 in words is "one hundred twenty-one million, six hundred nineteen thousand, two hundred one".