1234012161321 has 21 divisors (see below), whose sum is σ = 1850216839149. Its totient is φ = 822654778716.

The previous prime is 1234012161311. The next prime is 1234012161377. The reversal of 1234012161321 is 1231612104321.

The square root of 1234012161321 is 1110861.

It is a perfect power (a square), and thus also a powerful number.

1234012161321 is a `hidden beast` number, since 1 + 2 + 3 + 4 + 0 + 1 + 21 + 613 + 21 = 666.

It is not a de Polignac number, because 1234012161321 - 2⁹ = 1234012160809 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (1234012161311) by changing a digit.

It is a polite number, since it can be written in 20 ways as a sum of consecutive naturals, for example, 29972676 + ... + 30013818.

It is an arithmetic number, because the mean of its divisors is an integer number (88105563769).

Almost surely, 2^{1234012161321} is an apocalyptic number.

1234012161321 is the 1110861-st square number.

1234012161321 is the 555431-st centered octagonal number.

It is an amenable number.

1234012161321 is a deficient number, since it is larger than the sum of its proper divisors (616204677828).

1234012161321 is an frugal number, since it uses more digits than its factorization.

1234012161321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82304 (or 41146 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

Adding to 1234012161321 its reverse (1231612104321), we get a palindrome (2465624265642).

The spelling of 1234012161321 in words is "one trillion, two hundred thirty-four billion, twelve million, one hundred sixty-one thousand, three hundred twenty-one".