121552511 has 4 divisors (see below), whose sum is σ = 124837752. Its totient is φ = 118267272.

The previous prime is 121552507. The next prime is 121552553. The reversal of 121552511 is 115255121.

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 121552511 - 2² = 121552507 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 (121552111) 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, 1642565 + ... + 1642638.

It is an arithmetic number, because the mean of its divisors is an integer number (31209438).

Almost surely, 2^121552511 is an apocalyptic number.

121552511 is a deficient number, since it is larger than the sum of its proper divisors (3285241).

121552511 is an equidigital number, since it uses as much as digits as its factorization.

121552511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3285240.

The product of its digits is 500, while the sum is 23.

The square root of 121552511 is about 11025.0855325480. The cubic root of 121552511 is about 495.3604299387.

The spelling of 121552511 in words is "one hundred twenty-one million, five hundred fifty-two thousand, five hundred eleven".