1001221310 has 16 divisors (see below), whose sum is σ = 1803502800. Its totient is φ = 400198656.

The previous prime is 1001221301. The next prime is 1001221343. The reversal of 1001221310 is 131221001.

It is a super-2 number, since 2×1001221310² = 2004888223196232200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1001221291 and 1001221300.

It is a congruent number.

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, 21440 + ... + 49619.

It is an arithmetic number, because the mean of its divisors is an integer number (112718925).

Almost surely, 2^1001221310 is an apocalyptic number.

1001221310 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1001221310 is a deficient number, since it is larger than the sum of its proper divisors (802281490).

1001221310 is a wasteful number, since it uses less digits than its factorization.

1001221310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72475.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 1001221310 is about 31642.0813158680. The cubic root of 1001221310 is about 1000.4069377126.

Adding to 1001221310 its reverse (131221001), we get a palindrome (1132442311).

The spelling of 1001221310 in words is "one billion, one million, two hundred twenty-one thousand, three hundred ten".