1305421161231 has 16 divisors (see below), whose sum is σ = 1899078013440. Its totient is φ = 791046174720.

The previous prime is 1305421161223. The next prime is 1305421161281. The reversal of 1305421161231 is 1321611245031.

It is not a de Polignac number, because 1305421161231 - 2³ = 1305421161223 is a prime.

It is a super-2 number, since 2×1305421161231² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1305421161221) 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, 2729586 + ... + 3171983.

It is an arithmetic number, because the mean of its divisors is an integer number (118692375840).

Almost surely, 2^{1305421161231} is an apocalyptic number.

1305421161231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1305421161231 is a deficient number, since it is larger than the sum of its proper divisors (593656852209).

1305421161231 is a wasteful number, since it uses less digits than its factorization.

1305421161231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5908286.

The product of its (nonzero) digits is 4320, while the sum is 30.

The spelling of 1305421161231 in words is "one trillion, three hundred five billion, four hundred twenty-one million, one hundred sixty-one thousand, two hundred thirty-one".