1001221233331 has 16 divisors (see below), whose sum is σ = 1104583132800. Its totient is φ = 899917585600.

The previous prime is 1001221233323. The next prime is 1001221233359. The reversal of 1001221233331 is 1333321221001.

It is not a de Polignac number, because 1001221233331 - 2³ = 1001221233323 is a prime.

It is a super-2 number, since 2×1001221233331² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1001221263331) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28352796 + ... + 28388086.

It is an arithmetic number, because the mean of its divisors is an integer number (69036445800).

Almost surely, 2^{1001221233331} is an apocalyptic number.

1001221233331 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1001221233331 is a deficient number, since it is larger than the sum of its proper divisors (103361899469).

1001221233331 is a wasteful number, since it uses less digits than its factorization.

1001221233331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64370.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 1001221233331 its reverse (1333321221001), we get a palindrome (2334542454332).

The spelling of 1001221233331 in words is "one trillion, one billion, two hundred twenty-one million, two hundred thirty-three thousand, three hundred thirty-one".