121531411 has 4 divisors (see below), whose sum is σ = 122259312. Its totient is φ = 120803512.

The previous prime is 121531393. The next prime is 121531427. The reversal of 121531411 is 114135121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 114135121 = 37 ⋅3084733.

It is a cyclic number.

It is not a de Polignac number, because 121531411 - 2¹¹ = 121529363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121531211) 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, 363700 + ... + 364033.

It is an arithmetic number, because the mean of its divisors is an integer number (30564828).

Almost surely, 2^121531411 is an apocalyptic number.

121531411 is a deficient number, since it is larger than the sum of its proper divisors (727901).

121531411 is an equidigital number, since it uses as much as digits as its factorization.

121531411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 727900.

The product of its digits is 120, while the sum is 19.

The square root of 121531411 is about 11024.1285823416. The cubic root of 121531411 is about 495.3317654824.

Adding to 121531411 its reverse (114135121), we get a palindrome (235666532).

The spelling of 121531411 in words is "one hundred twenty-one million, five hundred thirty-one thousand, four hundred eleven".