1331402123 has 4 divisors (see below), whose sum is σ = 1331480688. Its totient is φ = 1331323560.

The previous prime is 1331402071. The next prime is 1331402129. The reversal of 1331402123 is 3212041331.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1331402123 - 2¹⁴ = 1331385739 is a prime.

It is a super-2 number, since 2×1331402123² = 3545263226257814258, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1331402095 and 1331402104.

It is not an unprimeable number, because it can be changed into a prime (1331402129) 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, 2183 + ... + 51648.

It is an arithmetic number, because the mean of its divisors is an integer number (332870172).

Almost surely, 2^1331402123 is an apocalyptic number.

1331402123 is a deficient number, since it is larger than the sum of its proper divisors (78565).

1331402123 is an equidigital number, since it uses as much as digits as its factorization.

1331402123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78564.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 1331402123 is about 36488.3833980076. The cubic root of 1331402123 is about 1100.1107665317.

Adding to 1331402123 its reverse (3212041331), we get a palindrome (4543443454).

The spelling of 1331402123 in words is "one billion, three hundred thirty-one million, four hundred two thousand, one hundred twenty-three".