121199501 has 2 divisors, whose sum is σ = 121199502. Its totient is φ = 121199500.

The previous prime is 121199483. The next prime is 121199539. The reversal of 121199501 is 105991121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 92833225 + 28366276 = 9635^2 + 5326^2 .

It is an emirp because it is prime and its reverse (105991121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121199501 - 2⁶ = 121199437 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (121199101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60599750 + 60599751.

It is an arithmetic number, because the mean of its divisors is an integer number (60599751).

Almost surely, 2^121199501 is an apocalyptic number.

It is an amenable number.

121199501 is a deficient number, since it is larger than the sum of its proper divisors (1).

121199501 is an equidigital number, since it uses as much as digits as its factorization.

121199501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 810, while the sum is 29.

The square root of 121199501 is about 11009.0644924989. The cubic root of 121199501 is about 494.8804268538.

The spelling of 121199501 in words is "one hundred twenty-one million, one hundred ninety-nine thousand, five hundred one".