121125001 has 2 divisors, whose sum is σ = 121125002. Its totient is φ = 121125000.

The previous prime is 121124999. The next prime is 121125049. The reversal of 121125001 is 100521121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 114468601 + 6656400 = 10699^2 + 2580^2 .

It is an emirp because it is prime and its reverse (100521121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121125001 - 2¹ = 121124999 is a prime.

Together with 121124999, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (121125071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60562500 + 60562501.

It is an arithmetic number, because the mean of its divisors is an integer number (60562501).

Almost surely, 2^121125001 is an apocalyptic number.

It is an amenable number.

121125001 is a deficient number, since it is larger than the sum of its proper divisors (1).

121125001 is an equidigital number, since it uses as much as digits as its factorization.

121125001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20, while the sum is 13.

The square root of 121125001 is about 11005.6803969587. The cubic root of 121125001 is about 494.7790068856.

Adding to 121125001 its reverse (100521121), we get a palindrome (221646122).

The spelling of 121125001 in words is "one hundred twenty-one million, one hundred twenty-five thousand, one".