121653001 has 2 divisors, whose sum is σ = 121653002. Its totient is φ = 121653000.

The previous prime is 121652989. The next prime is 121653011. The reversal of 121653001 is 100356121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 113103225 + 8549776 = 10635^2 + 2924^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121653001 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121653001.

It is not a weakly prime, because it can be changed into another prime (121653011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60826500 + 60826501.

It is an arithmetic number, because the mean of its divisors is an integer number (60826501).

Almost surely, 2^121653001 is an apocalyptic number.

It is an amenable number.

121653001 is a deficient number, since it is larger than the sum of its proper divisors (1).

121653001 is an equidigital number, since it uses as much as digits as its factorization.

121653001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 121653001 is about 11029.6419252848. The cubic root of 121653001 is about 495.4969006097.

The spelling of 121653001 in words is "one hundred twenty-one million, six hundred fifty-three thousand, one".