2001022233431 has 32 divisors (see below), whose sum is σ = 2210146041600. Its totient is φ = 1800390873600.

The previous prime is 2001022233389. The next prime is 2001022233437. The reversal of 2001022233431 is 1343322201002.

It is a cyclic number.

It is not a de Polignac number, because 2001022233431 - 2⁶ = 2001022233367 is a prime.

It is a super-2 number, since 2×2001022233431² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2001022233397 and 2001022233406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001022233437) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 50906021 + ... + 50945313.

It is an arithmetic number, because the mean of its divisors is an integer number (69067063800).

Almost surely, 2^{2001022233431} is an apocalyptic number.

2001022233431 is a deficient number, since it is larger than the sum of its proper divisors (209123808169).

2001022233431 is a wasteful number, since it uses less digits than its factorization.

2001022233431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39947.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 2001022233431 its reverse (1343322201002), we get a palindrome (3344344434433).

The spelling of 2001022233431 in words is "two trillion, one billion, twenty-two million, two hundred thirty-three thousand, four hundred thirty-one".