121223304531 has 48 divisors (see below), whose sum is σ = 204865140480. Its totient is φ = 67627586880.

The previous prime is 121223304529. The next prime is 121223304593. The reversal of 121223304531 is 135403322121.

121223304531 is a `hidden beast` number, since 1 + 2 + 122 + 3 + 3 + 0 + 4 + 531 = 666.

It is not a de Polignac number, because 121223304531 - 2¹ = 121223304529 is a prime.

It is a super-2 number, since 2×121223304531² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 121223304495 and 121223304504.

It is not an unprimeable number, because it can be changed into a prime (121223305531) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6462436 + ... + 6481166.

It is an arithmetic number, because the mean of its divisors is an integer number (4268023760).

Almost surely, 2^121223304531 is an apocalyptic number.

121223304531 is a deficient number, since it is larger than the sum of its proper divisors (83641835949).

121223304531 is a wasteful number, since it uses less digits than its factorization.

121223304531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21176 (or 21173 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

Adding to 121223304531 its reverse (135403322121), we get a palindrome (256626626652).

The spelling of 121223304531 in words is "one hundred twenty-one billion, two hundred twenty-three million, three hundred four thousand, five hundred thirty-one".