121545304331 has 16 divisors (see below), whose sum is σ = 134247818880. Its totient is φ = 109119381120.

The previous prime is 121545304319. The next prime is 121545304333. The reversal of 121545304331 is 133403545121.

It is a cyclic number.

It is not a de Polignac number, because 121545304331 - 2¹⁰ = 121545303307 is a prime.

It is a super-2 number, since 2×121545304331² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121545304333) 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, 2291891 + ... + 2344323.

It is an arithmetic number, because the mean of its divisors is an integer number (8390488680).

Almost surely, 2^121545304331 is an apocalyptic number.

121545304331 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

121545304331 is a deficient number, since it is larger than the sum of its proper divisors (12702514549).

121545304331 is a wasteful number, since it uses less digits than its factorization.

121545304331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55066.

The product of its (nonzero) digits is 21600, while the sum is 32.

Adding to 121545304331 its reverse (133403545121), we get a palindrome (254948849452).

The spelling of 121545304331 in words is "one hundred twenty-one billion, five hundred forty-five million, three hundred four thousand, three hundred thirty-one".