1021012023 has 4 divisors (see below), whose sum is σ = 1361349368. Its totient is φ = 680674680.

The previous prime is 1021011991. The next prime is 1021012033. The reversal of 1021012023 is 3202101201.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1021012023 - 2⁵ = 1021011991 is a prime.

It is a super-2 number, since 2×1021012023² = 2084931102221105058, 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 (1021012033) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 170168668 + ... + 170168673.

It is an arithmetic number, because the mean of its divisors is an integer number (340337342).

Almost surely, 2^1021012023 is an apocalyptic number.

1021012023 is a deficient number, since it is larger than the sum of its proper divisors (340337345).

1021012023 is an equidigital number, since it uses as much as digits as its factorization.

1021012023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340337344.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 1021012023 is about 31953.2787519528. The cubic root of 1021012023 is about 1006.9555162923.

Adding to 1021012023 its reverse (3202101201), we get a palindrome (4223113224).

The spelling of 1021012023 in words is "one billion, twenty-one million, twelve thousand, twenty-three".