1021243112 has 16 divisors (see below), whose sum is σ = 1939070400. Its totient is φ = 504157680.

The previous prime is 1021243109. The next prime is 1021243117. The reversal of 1021243112 is 2113421201.

It is not an unprimeable number, because it can be changed into a prime (1021243117) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 807314 + ... + 808577.

It is an arithmetic number, because the mean of its divisors is an integer number (121191900).

Almost surely, 2^1021243112 is an apocalyptic number.

It is an amenable number.

1021243112 is a deficient number, since it is larger than the sum of its proper divisors (917827288).

1021243112 is a wasteful number, since it uses less digits than its factorization.

1021243112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1615976 (or 1615972 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 1021243112 is about 31956.8945925601. The cubic root of 1021243112 is about 1007.0314797432.

Adding to 1021243112 its reverse (2113421201), we get a palindrome (3134664313).

The spelling of 1021243112 in words is "one billion, twenty-one million, two hundred forty-three thousand, one hundred twelve".