1020233021 has 4 divisors (see below), whose sum is σ = 1055413500. Its totient is φ = 985052544.

The previous prime is 1020232979. The next prime is 1020233029. The reversal of 1020233021 is 1203320201.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 231465796 + 788767225 = 15214^2 + 28085^2 .

It is a cyclic number.

It is not a de Polignac number, because 1020233021 - 2²⁶ = 953124157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1020232987 and 1020233005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020233029) 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, 17590196 + ... + 17590253.

It is an arithmetic number, because the mean of its divisors is an integer number (263853375).

Almost surely, 2^1020233021 is an apocalyptic number.

It is an amenable number.

1020233021 is a deficient number, since it is larger than the sum of its proper divisors (35180479).

1020233021 is an equidigital number, since it uses as much as digits as its factorization.

1020233021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35180478.

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 1020233021 is about 31941.0867222767. The cubic root of 1020233021 is about 1006.6993587008.

Adding to 1020233021 its reverse (1203320201), we get a palindrome (2223553222).

The spelling of 1020233021 in words is "one billion, twenty million, two hundred thirty-three thousand, twenty-one".