1021405112 has 64 divisors (see below), whose sum is σ = 2433177600. Its totient is φ = 391029120.

The previous prime is 1021405103. The next prime is 1021405127. The reversal of 1021405112 is 2115041201.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 62 + ... + 45197.

It is an arithmetic number, because the mean of its divisors is an integer number (38018400).

Almost surely, 2^1021405112 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1021405112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1216588800).

1021405112 is an abundant number, since it is smaller than the sum of its proper divisors (1411772488).

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

1021405112 is a wasteful number, since it uses less digits than its factorization.

1021405112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45316 (or 45312 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 17.

The square root of 1021405112 is about 31959.4291563538. The cubic root of 1021405112 is about 1007.0847254631.

Adding to 1021405112 its reverse (2115041201), we get a palindrome (3136446313).

The spelling of 1021405112 in words is "one billion, twenty-one million, four hundred five thousand, one hundred twelve".