1210989231 has 16 divisors (see below), whose sum is σ = 1811480320. Its totient is φ = 799486200.

The previous prime is 1210989229. The next prime is 1210989251. The reversal of 1210989231 is 1329890121.

It is not a de Polignac number, because 1210989231 - 2¹ = 1210989229 is a prime.

It is a super-2 number, since 2×1210989231² = 2932989835195942722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1210989251) 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, 214945 + ... + 220506.

It is an arithmetic number, because the mean of its divisors is an integer number (113217520).

Almost surely, 2^1210989231 is an apocalyptic number.

1210989231 is a deficient number, since it is larger than the sum of its proper divisors (600491089).

1210989231 is a wasteful number, since it uses less digits than its factorization.

1210989231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 435563 (or 435557 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 36.

The square root of 1210989231 is about 34799.2705526998. The cubic root of 1210989231 is about 1065.8925507145.

The spelling of 1210989231 in words is "one billion, two hundred ten million, nine hundred eighty-nine thousand, two hundred thirty-one".