1331400234121 has 4 divisors (see below), whose sum is σ = 1332423602244. Its totient is φ = 1330376866000.

The previous prime is 1331400234067. The next prime is 1331400234133. The reversal of 1331400234121 is 1214320041331.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 82506817600 + 1248893416521 = 287240^2 + 1117539^2 .

It is a cyclic number.

It is not a de Polignac number, because 1331400234121 - 2¹³ = 1331400225929 is a prime.

It is a super-2 number, since 2×1331400234121² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1331400274121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 511682110 + ... + 511684711.

It is an arithmetic number, because the mean of its divisors is an integer number (333105900561).

Almost surely, 2^{1331400234121} is an apocalyptic number.

It is an amenable number.

1331400234121 is a deficient number, since it is larger than the sum of its proper divisors (1023368123).

1331400234121 is a wasteful number, since it uses less digits than its factorization.

1331400234121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1023368122.

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 1331400234121 its reverse (1214320041331), we get a palindrome (2545720275452).

The spelling of 1331400234121 in words is "one trillion, three hundred thirty-one billion, four hundred million, two hundred thirty-four thousand, one hundred twenty-one".