121552101 has 24 divisors (see below), whose sum is σ = 201620640. Its totient is φ = 69789600.

The previous prime is 121552097. The next prime is 121552111. The reversal of 121552101 is 101255121.

121552101 is a `hidden beast` number, since 12 + 1 + 552 + 101 = 666.

It is not a de Polignac number, because 121552101 - 2² = 121552097 is a prime.

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 23 ways as a sum of consecutive naturals, for example, 30430 + ... + 34191.

It is an arithmetic number, because the mean of its divisors is an integer number (8400860).

Almost surely, 2^121552101 is an apocalyptic number.

121552101 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121552101 is a deficient number, since it is larger than the sum of its proper divisors (80068539).

121552101 is a wasteful number, since it uses less digits than its factorization.

121552101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64657 (or 64654 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 18.

The square root of 121552101 is about 11025.0669385723. The cubic root of 121552101 is about 495.3598729833.

The spelling of 121552101 in words is "one hundred twenty-one million, five hundred fifty-two thousand, one hundred one".