1021221412 has 12 divisors (see below), whose sum is σ = 1787610076. Its totient is φ = 510475680.

The previous prime is 1021221379. The next prime is 1021221469. The reversal of 1021221412 is 2141221201.

It can be written as a sum of positive squares in 2 ways, for example, as 44408896 + 976812516 = 6664^2 + 31254^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15663 + ... + 47830.

Almost surely, 2^1021221412 is an apocalyptic number.

It is an amenable number.

1021221412 is a deficient number, since it is larger than the sum of its proper divisors (766388664).

1021221412 is a wasteful number, since it uses less digits than its factorization.

1021221412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67518 (or 67516 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 1021221412 is about 31956.5550709084. Note that the first 3 decimals coincide. The cubic root of 1021221412 is about 1007.0243470185.

Adding to 1021221412 its reverse (2141221201), we get a palindrome (3162442613).

The spelling of 1021221412 in words is "one billion, twenty-one million, two hundred twenty-one thousand, four hundred twelve".