1021221112 has 32 divisors (see below), whose sum is σ = 1969783200. Its totient is φ = 496051200.

The previous prime is 1021221077. The next prime is 1021221133. The reversal of 1021221112 is 2111221201.

It is a junction number, because it is equal to n+sod(n) for n = 1021221092 and 1021221101.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72589 + ... + 85507.

It is an arithmetic number, because the mean of its divisors is an integer number (61555725).

Almost surely, 2^1021221112 is an apocalyptic number.

It is an amenable number.

1021221112 is a deficient number, since it is larger than the sum of its proper divisors (948562088).

1021221112 is a wasteful number, since it uses less digits than its factorization.

1021221112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13207 (or 13203 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

The square root of 1021221112 is about 31956.5503770354. The cubic root of 1021221112 is about 1007.0242484087.

Adding to 1021221112 its reverse (2111221201), we get a palindrome (3132442313).

The spelling of 1021221112 in words is "one billion, twenty-one million, two hundred twenty-one thousand, one hundred twelve".