1021381330 has 16 divisors (see below), whose sum is σ = 1840077504. Its totient is φ = 408198960.

The previous prime is 1021381327. The next prime is 1021381331. The reversal of 1021381330 is 331831201.

It is not an unprimeable number, because it can be changed into a prime (1021381331) 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, 31902 + ... + 55321.

It is an arithmetic number, because the mean of its divisors is an integer number (115004844).

Almost surely, 2^1021381330 is an apocalyptic number.

1021381330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1021381330 is a deficient number, since it is larger than the sum of its proper divisors (818696174).

1021381330 is a wasteful number, since it uses less digits than its factorization.

1021381330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88401.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 1021381330 is about 31959.0570887190. The cubic root of 1021381330 is about 1007.0769092126.

The spelling of 1021381330 in words is "one billion, twenty-one million, three hundred eighty-one thousand, three hundred thirty".