1021244133 has 24 divisors (see below), whose sum is σ = 1705817568. Its totient is φ = 538677216.

The previous prime is 1021244131. The next prime is 1021244177. The reversal of 1021244133 is 3314421201.

It is not a de Polignac number, because 1021244133 - 2¹ = 1021244131 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021244131) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 265291 + ... + 269112.

It is an arithmetic number, because the mean of its divisors is an integer number (71075732).

Almost surely, 2^1021244133 is an apocalyptic number.

1021244133 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1021244133 is a deficient number, since it is larger than the sum of its proper divisors (684573435).

1021244133 is a wasteful number, since it uses less digits than its factorization.

1021244133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 534433 (or 534426 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 1021244133 is about 31956.9105671997. The cubic root of 1021244133 is about 1007.0318153403.

Adding to 1021244133 its reverse (3314421201), we get a palindrome (4335665334).

It can be divided in two parts, 10212 and 44133, that added together give a palindrome (54345).

The spelling of 1021244133 in words is "one billion, twenty-one million, two hundred forty-four thousand, one hundred thirty-three".