1020023021 has 8 divisors (see below), whose sum is σ = 1069025280. Its totient is φ = 971408592.

The previous prime is 1020022987. The next prime is 1020023027. The reversal of 1020023021 is 1203200201.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1020023021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1020022993 and 1020023011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1020023027) 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, 91565 + ... + 102098.

It is an arithmetic number, because the mean of its divisors is an integer number (133628160).

Almost surely, 2^1020023021 is an apocalyptic number.

It is an amenable number.

1020023021 is a deficient number, since it is larger than the sum of its proper divisors (49002259).

1020023021 is a wasteful number, since it uses less digits than its factorization.

1020023021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193915.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 1020023021 is about 31937.7992510442. The cubic root of 1020023021 is about 1006.6302825297.

Adding to 1020023021 its reverse (1203200201), we get a palindrome (2223223222).

The spelling of 1020023021 in words is "one billion, twenty million, twenty-three thousand, twenty-one".