121331104234231 has 32 divisors (see below), whose sum is σ = 128294102458368. Its totient is φ = 114582842075520.

The previous prime is 121331104234229. The next prime is 121331104234243. The reversal of 121331104234231 is 132432401133121.

It is a cyclic number.

It is not a de Polignac number, because 121331104234231 - 2¹ = 121331104234229 is a prime.

It is a super-2 number, since 2×121331104234231² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121331104234193 and 121331104234202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121331104234271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1120818550 + ... + 1120926796.

It is an arithmetic number, because the mean of its divisors is an integer number (4009190701824).

Almost surely, 2^{121331104234231} is an apocalyptic number.

121331104234231 is a deficient number, since it is larger than the sum of its proper divisors (6962998224137).

121331104234231 is a wasteful number, since it uses less digits than its factorization.

121331104234231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111991.

The product of its (nonzero) digits is 10368, while the sum is 31.

Adding to 121331104234231 its reverse (132432401133121), we get a palindrome (253763505367352).

The spelling of 121331104234231 in words is "one hundred twenty-one trillion, three hundred thirty-one billion, one hundred four million, two hundred thirty-four thousand, two hundred thirty-one".