121126151 has 4 divisors (see below), whose sum is σ = 122934072. Its totient is φ = 119318232.

The previous prime is 121126111. The next prime is 121126163. The reversal of 121126151 is 151621121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 151621121 = 19 ⋅7980059.

It is a cyclic number.

It is not a de Polignac number, because 121126151 - 2¹⁴ = 121109767 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121126111) 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, 903860 + ... + 903993.

It is an arithmetic number, because the mean of its divisors is an integer number (30733518).

Almost surely, 2^121126151 is an apocalyptic number.

121126151 is a deficient number, since it is larger than the sum of its proper divisors (1807921).

121126151 is an equidigital number, since it uses as much as digits as its factorization.

121126151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1807920.

The product of its digits is 120, while the sum is 20.

The square root of 121126151 is about 11005.7326425822. The cubic root of 121126151 is about 494.7805727447.

Adding to 121126151 its reverse (151621121), we get a palindrome (272747272).

It can be divided in two parts, 1211 and 26151, that multiplied together give a triangular number (31668861 = T₇₉₅₈).

The spelling of 121126151 in words is "one hundred twenty-one million, one hundred twenty-six thousand, one hundred fifty-one".