121522147 has 4 divisors (see below), whose sum is σ = 122657976. Its totient is φ = 120386320.

The previous prime is 121522129. The next prime is 121522153. The reversal of 121522147 is 741225121.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121522147 is a prime.

It is a super-2 number, since 2×121522147² = 29535264422979218, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121522447) 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 in 3 ways as a sum of consecutive naturals, for example, 567754 + ... + 567967.

It is an arithmetic number, because the mean of its divisors is an integer number (30664494).

Almost surely, 2^121522147 is an apocalyptic number.

121522147 is a deficient number, since it is larger than the sum of its proper divisors (1135829).

121522147 is a wasteful number, since it uses less digits than its factorization.

121522147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1135828.

The product of its digits is 1120, while the sum is 25.

The square root of 121522147 is about 11023.7084050695. The cubic root of 121522147 is about 495.3191792437.

Adding to 121522147 its reverse (741225121), we get a palindrome (862747268).

The spelling of 121522147 in words is "one hundred twenty-one million, five hundred twenty-two thousand, one hundred forty-seven".