1021244231 has 18 divisors (see below), whose sum is σ = 1204782552. Its totient is φ = 863140320.

The previous prime is 1021244207. The next prime is 1021244261. The reversal of 1021244231 is 1324421201.

It is a de Polignac number, because none of the positive numbers 2^k-1021244231 is a prime.

It is a super-2 number, since 2×1021244231² = 2085879558701562722, 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 (1021244261) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 259166 + ... + 263076.

It is an arithmetic number, because the mean of its divisors is an integer number (66932364).

Almost surely, 2^1021244231 is an apocalyptic number.

1021244231 is a deficient number, since it is larger than the sum of its proper divisors (183538321).

1021244231 is an frugal number, since it uses more digits than its factorization.

1021244231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4071 (or 3991 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 1021244231 is about 31956.9121005143. The cubic root of 1021244231 is about 1007.0318475524.

Adding to 1021244231 its reverse (1324421201), we get a palindrome (2345665432).

The spelling of 1021244231 in words is "one billion, twenty-one million, two hundred forty-four thousand, two hundred thirty-one".