121522755 has 8 divisors (see below), whose sum is σ = 194436432. Its totient is φ = 64812128.

The previous prime is 121522691. The next prime is 121522757. The reversal of 121522755 is 557225121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121522755 - 2⁶ = 121522691 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121522757) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4050744 + ... + 4050773.

It is an arithmetic number, because the mean of its divisors is an integer number (24304554).

Almost surely, 2^121522755 is an apocalyptic number.

121522755 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

121522755 is a deficient number, since it is larger than the sum of its proper divisors (72913677).

121522755 is an equidigital number, since it uses as much as digits as its factorization.

121522755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8101525.

The product of its digits is 7000, while the sum is 30.

The square root of 121522755 is about 11023.7359819618. The cubic root of 121522755 is about 495.3200053031.

Adding to 121522755 its reverse (557225121), we get a palindrome (678747876).

The spelling of 121522755 in words is "one hundred twenty-one million, five hundred twenty-two thousand, seven hundred fifty-five".