1021223144 has 32 divisors (see below), whose sum is σ = 1957927680. Its totient is φ = 499136064.

The previous prime is 1021223141. The next prime is 1021223213. The reversal of 1021223144 is 4413221201.

It is not an unprimeable number, because it can be changed into a prime (1021223141) 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, 543134 + ... + 545010.

It is an arithmetic number, because the mean of its divisors is an integer number (61185240).

Almost surely, 2^1021223144 is an apocalyptic number.

It is an amenable number.

1021223144 is a deficient number, since it is larger than the sum of its proper divisors (936704536).

1021223144 is a wasteful number, since it uses less digits than its factorization.

1021223144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3377 (or 3373 counting only the distinct ones).

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

The square root of 1021223144 is about 31956.5821701884. The cubic root of 1021223144 is about 1007.0249163254.

Adding to 1021223144 its reverse (4413221201), we get a palindrome (5434444345).

The spelling of 1021223144 in words is "one billion, twenty-one million, two hundred twenty-three thousand, one hundred forty-four".