1021130442 has 16 divisors (see below), whose sum is σ = 2269178880. Its totient is φ = 340376796.

The previous prime is 1021130441. The next prime is 1021130443. The reversal of 1021130442 is 2440311201.

1021130442 is a `hidden beast` number, since 10 + 211 + 3 + 0 + 442 = 666.

It is an interprime number because it is at equal distance from previous prime (1021130441) and next prime (1021130443).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (1021130441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9454858 + ... + 9454965.

It is an arithmetic number, because the mean of its divisors is an integer number (141823680).

Almost surely, 2^1021130442 is an apocalyptic number.

1021130442 is an abundant number, since it is smaller than the sum of its proper divisors (1248048438).

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

1021130442 is a wasteful number, since it uses less digits than its factorization.

1021130442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18909834 (or 18909828 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 1021130442 is about 31955.1317005579. The cubic root of 1021130442 is about 1006.9944443535.

Adding to 1021130442 its reverse (2440311201), we get a palindrome (3461441643).

The spelling of 1021130442 in words is "one billion, twenty-one million, one hundred thirty thousand, four hundred forty-two".