121353555 has 16 divisors (see below), whose sum is σ = 196902144. Its totient is φ = 63809760.

The previous prime is 121353527. The next prime is 121353571. The reversal of 121353555 is 555353121.

It is not a de Polignac number, because 121353555 - 2¹⁷ = 121222483 is a prime.

It is a super-2 number, since 2×121353555² = 29453370622276050, which contains 22 as substring.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 55909 + ... + 58038.

It is an arithmetic number, because the mean of its divisors is an integer number (12306384).

Almost surely, 2^121353555 is an apocalyptic number.

121353555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

121353555 is a deficient number, since it is larger than the sum of its proper divisors (75548589).

121353555 is a wasteful number, since it uses less digits than its factorization.

121353555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114026.

The product of its digits is 11250, while the sum is 30.

The square root of 121353555 is about 11016.0589595372. The cubic root of 121353555 is about 495.0900152592.

The spelling of 121353555 in words is "one hundred twenty-one million, three hundred fifty-three thousand, five hundred fifty-five".