1231222031 has 8 divisors (see below), whose sum is σ = 1342716480. Its totient is φ = 1122125472.

The previous prime is 1231222007. The next prime is 1231222037. The reversal of 1231222031 is 1302221321.

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

It is not a de Polignac number, because 1231222031 - 2¹⁸ = 1230959887 is a prime.

It is a super-2 number, since 2×1231222031² = 3031815379239529922, 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 (1231222037) 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, 598400 + ... + 600453.

It is an arithmetic number, because the mean of its divisors is an integer number (167839560).

Almost surely, 2^1231222031 is an apocalyptic number.

1231222031 is a deficient number, since it is larger than the sum of its proper divisors (111494449).

1231222031 is a wasteful number, since it uses less digits than its factorization.

1231222031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1198945.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 1231222031 is about 35088.7735750339. The cubic root of 1231222031 is about 1071.7959854274.

Adding to 1231222031 its reverse (1302221321), we get a palindrome (2533443352).

It can be divided in two parts, 12312 and 22031, that added together give a palindrome (34343).

The spelling of 1231222031 in words is "one billion, two hundred thirty-one million, two hundred twenty-two thousand, thirty-one".