121022151 has 4 divisors (see below), whose sum is σ = 161362872. Its totient is φ = 80681432.

The previous prime is 121022141. The next prime is 121022173. The reversal of 121022151 is 151220121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 121022151 - 2⁶ = 121022087 is a prime.

It is a super-2 number, since 2×121022151² = 29292722065333602, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 121022151.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121022141) 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, 20170356 + ... + 20170361.

It is an arithmetic number, because the mean of its divisors is an integer number (40340718).

Almost surely, 2^121022151 is an apocalyptic number.

121022151 is a deficient number, since it is larger than the sum of its proper divisors (40340721).

121022151 is an equidigital number, since it uses as much as digits as its factorization.

121022151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40340720.

The product of its (nonzero) digits is 40, while the sum is 15.

The square root of 121022151 is about 11001.0068175599. The cubic root of 121022151 is about 494.6389245172.

Adding to 121022151 its reverse (151220121), we get a palindrome (272242272).

The spelling of 121022151 in words is "one hundred twenty-one million, twenty-two thousand, one hundred fifty-one".