1231211253 has 8 divisors (see below), whose sum is σ = 1672589088. Its totient is φ = 805320464.

The previous prime is 1231211249. The next prime is 1231211273. The reversal of 1231211253 is 3521121321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1231211253 - 2² = 1231211249 is a prime.

It is a super-2 number, since 2×1231211253² = 3031762299027660018, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231211243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3871575 + ... + 3871892.

It is an arithmetic number, because the mean of its divisors is an integer number (209073636).

Almost surely, 2^1231211253 is an apocalyptic number.

It is an amenable number.

1231211253 is a deficient number, since it is larger than the sum of its proper divisors (441377835).

1231211253 is an equidigital number, since it uses as much as digits as its factorization.

1231211253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7743523.

The product of its digits is 360, while the sum is 21.

The square root of 1231211253 is about 35088.6199928125. The cubic root of 1231211253 is about 1071.7928579518.

Adding to 1231211253 its reverse (3521121321), we get a palindrome (4752332574).

The spelling of 1231211253 in words is "one billion, two hundred thirty-one million, two hundred eleven thousand, two hundred fifty-three".