121021151 has 2 divisors, whose sum is σ = 121021152. Its totient is φ = 121021150.

The previous prime is 121021111. The next prime is 121021157. The reversal of 121021151 is 151120121.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121021151 is a prime.

It is a super-3 number, since 3×121021151³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Sophie Germain 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 (121021157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60510575 + 60510576.

It is an arithmetic number, because the mean of its divisors is an integer number (60510576).

Almost surely, 2^121021151 is an apocalyptic number.

121021151 is a deficient number, since it is larger than the sum of its proper divisors (1).

121021151 is an equidigital number, since it uses as much as digits as its factorization.

121021151 is an odious number, because the sum of its binary digits is odd.

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

The square root of 121021151 is about 11000.9613670806. The cubic root of 121021151 is about 494.6375621212.

Adding to 121021151 its reverse (151120121), we get a palindrome (272141272).

The spelling of 121021151 in words is "one hundred twenty-one million, twenty-one thousand, one hundred fifty-one".