1022021012 has 12 divisors (see below), whose sum is σ = 1791439860. Its totient is φ = 510181056.

The previous prime is 1022021009. The next prime is 1022021017. The reversal of 1022021012 is 2101202201.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 336942736 + 685078276 = 18356^2 + 26174^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1022020984 and 1022021002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1022021017) by changing a digit.

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, 204587 + ... + 209522.

It is an arithmetic number, because the mean of its divisors is an integer number (149286655).

Almost surely, 2^1022021012 is an apocalyptic number.

It is an amenable number.

1022021012 is a deficient number, since it is larger than the sum of its proper divisors (769418848).

1022021012 is a wasteful number, since it uses less digits than its factorization.

1022021012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 414730 (or 414728 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 1022021012 is about 31969.0633581905. The cubic root of 1022021012 is about 1007.2871064268.

Adding to 1022021012 its reverse (2101202201), we get a palindrome (3123223213).

The spelling of 1022021012 in words is "one billion, twenty-two million, twenty-one thousand, twelve".