121012151 has 4 divisors (see below), whose sum is σ = 130320792. Its totient is φ = 111703512.

The previous prime is 121012141. The next prime is 121012183. The reversal of 121012151 is 151210121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 151210121 = 17 ⋅8894713.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121012151 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 (121012141) 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, 4654301 + ... + 4654326.

It is an arithmetic number, because the mean of its divisors is an integer number (32580198).

Almost surely, 2^121012151 is an apocalyptic number.

121012151 is a deficient number, since it is larger than the sum of its proper divisors (9308641).

121012151 is an equidigital number, since it uses as much as digits as its factorization.

121012151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9308640.

The product of its (nonzero) digits is 20, while the sum is 14.

The square root of 121012151 is about 11000.5523043164. The cubic root of 121012151 is about 494.6253002193.

Adding to 121012151 its reverse (151210121), we get a palindrome (272222272).

The spelling of 121012151 in words is "one hundred twenty-one million, twelve thousand, one hundred fifty-one".