1089421231 has 16 divisors (see below), whose sum is σ = 1124444160. Its totient is φ = 1055103840.

The previous prime is 1089421219. The next prime is 1089421247. The reversal of 1089421231 is 1321249801.

It is a cyclic number.

It is not a de Polignac number, because 1089421231 - 2¹⁵ = 1089388463 is a prime.

It is a super-2 number, since 2×1089421231² = 2373677237107110722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1089421193 and 1089421202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1089422231) 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, 1313725 + ... + 1314553.

It is an arithmetic number, because the mean of its divisors is an integer number (70277760).

Almost surely, 2^1089421231 is an apocalyptic number.

1089421231 is a deficient number, since it is larger than the sum of its proper divisors (35022929).

1089421231 is an equidigital number, since it uses as much as digits as its factorization.

1089421231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1206.

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 1089421231 is about 33006.3816708224. The cubic root of 1089421231 is about 1028.9602827149.

The spelling of 1089421231 in words is "one billion, eighty-nine million, four hundred twenty-one thousand, two hundred thirty-one".