1023221020 has 24 divisors (see below), whose sum is σ = 2194484544. Its totient is φ = 400579776.

The previous prime is 1023221009. The next prime is 1023221029. The reversal of 1023221020 is 201223201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1023221029) 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, 543327 + ... + 545206.

It is an arithmetic number, because the mean of its divisors is an integer number (91436856).

Almost surely, 2^1023221020 is an apocalyptic number.

1023221020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1023221020 is an abundant number, since it is smaller than the sum of its proper divisors (1171263524).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1023221020 is a wasteful number, since it uses less digits than its factorization.

1023221020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1088589 (or 1088587 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 1023221020 is about 31987.8261218233. The cubic root of 1023221020 is about 1007.6811882815.

Adding to 1023221020 its reverse (201223201), we get a palindrome (1224444221).

The spelling of 1023221020 in words is "one billion, twenty-three million, two hundred twenty-one thousand, twenty".