121321134263 has 16 divisors (see below), whose sum is σ = 142010993664. Its totient is φ = 101483599200.

The previous prime is 121321134257. The next prime is 121321134313. The reversal of 121321134263 is 362431123121.

It is a cyclic number.

It is not a de Polignac number, because 121321134263 - 2¹⁶ = 121321068727 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121321134203) 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, 417188 + ... + 645513.

It is an arithmetic number, because the mean of its divisors is an integer number (8875687104).

Almost surely, 2^121321134263 is an apocalyptic number.

121321134263 is a deficient number, since it is larger than the sum of its proper divisors (20689859401).

121321134263 is a wasteful number, since it uses less digits than its factorization.

121321134263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1063102.

The product of its digits is 5184, while the sum is 29.

Adding to 121321134263 its reverse (362431123121), we get a palindrome (483752257384).

The spelling of 121321134263 in words is "one hundred twenty-one billion, three hundred twenty-one million, one hundred thirty-four thousand, two hundred sixty-three".