121321421331 has 16 divisors (see below), whose sum is σ = 178180803840. Its totient is φ = 72814266720.

The previous prime is 121321421327. The next prime is 121321421369. The reversal of 121321421331 is 133124123121.

It is not a de Polignac number, because 121321421331 - 2² = 121321421327 is a prime.

It is a super-2 number, since 2×121321421331² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (121321421311) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17843236 + ... + 17850033.

It is an arithmetic number, because the mean of its divisors is an integer number (11136300240).

Almost surely, 2^121321421331 is an apocalyptic number.

121321421331 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

121321421331 is a deficient number, since it is larger than the sum of its proper divisors (56859382509).

121321421331 is a wasteful number, since it uses less digits than its factorization.

121321421331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35693386.

The product of its digits is 864, while the sum is 24.

Adding to 121321421331 its reverse (133124123121), we get a palindrome (254445544452).

The spelling of 121321421331 in words is "one hundred twenty-one billion, three hundred twenty-one million, four hundred twenty-one thousand, three hundred thirty-one".