1001221010 has 16 divisors (see below), whose sum is σ = 1816390656. Its totient is φ = 397334448.

The previous prime is 1001220991. The next prime is 1001221021. The reversal of 1001221010 is 101221001.

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, 392912 + ... + 395451.

It is an arithmetic number, because the mean of its divisors is an integer number (113524416).

Almost surely, 2^1001221010 is an apocalyptic number.

1001221010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1001221010 is a deficient number, since it is larger than the sum of its proper divisors (815169646).

1001221010 is a wasteful number, since it uses less digits than its factorization.

1001221010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 788497.

The product of its (nonzero) digits is 4, while the sum is 8.

The square root of 1001221010 is about 31642.0765753451. The cubic root of 1001221010 is about 1000.4068377939.

Adding to 1001221010 its reverse (101221001), we get a palindrome (1102442011).

Subtracting from 1001221010 its reverse (101221001), we obtain a palindrome (900000009).

The spelling of 1001221010 in words is "one billion, one million, two hundred twenty-one thousand, ten".