1021113442 has 8 divisors (see below), whose sum is σ = 1533209436. Its totient is φ = 510043632.

The previous prime is 1021113439. The next prime is 1021113479. The reversal of 1021113442 is 2443111201.

It can be written as a sum of positive squares in 2 ways, for example, as 1015633161 + 5480281 = 31869^2 + 2341^2 .

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

It is a super-2 number, since 2×1021113442² = 2085345322866174728, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 254053 + ... + 258040.

Almost surely, 2^1021113442 is an apocalyptic number.

1021113442 is a deficient number, since it is larger than the sum of its proper divisors (512095994).

1021113442 is an equidigital number, since it uses as much as digits as its factorization.

1021113442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 513092.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 1021113442 is about 31954.8657014859. The cubic root of 1021113442 is about 1006.9888561022.

Adding to 1021113442 its reverse (2443111201), we get a palindrome (3464224643).

It can be divided in two parts, 10211 and 13442, that added together give a triangular number (23653 = T₂₁₇).

The spelling of 1021113442 in words is "one billion, twenty-one million, one hundred thirteen thousand, four hundred forty-two".