1021142223 has 12 divisors (see below), whose sum is σ = 1475370520. Its totient is φ = 680582736.

The previous prime is 1021142203. The next prime is 1021142267. The reversal of 1021142223 is 3222411201.

It is a happy number.

1021142223 is a `hidden beast` number, since 10 + 211 + 422 + 23 = 666.

It is not a de Polignac number, because 1021142223 - 2¹⁶ = 1021076687 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1021142196 and 1021142205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1021142203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 27693 + ... + 53001.

Almost surely, 2^1021142223 is an apocalyptic number.

1021142223 is a deficient number, since it is larger than the sum of its proper divisors (454228297).

1021142223 is a wasteful number, since it uses less digits than its factorization.

1021142223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29798 (or 29795 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 1021142223 is about 31955.3160366159. The cubic root of 1021142223 is about 1006.9983169753.

Adding to 1021142223 its reverse (3222411201), we get a palindrome (4243553424).

The spelling of 1021142223 in words is "one billion, twenty-one million, one hundred forty-two thousand, two hundred twenty-three".