2001221020012 has 12 divisors (see below), whose sum is σ = 3503434372200. Its totient is φ = 1000239770816.

The previous prime is 2001221019983. The next prime is 2001221020013. The reversal of 2001221020012 is 2100201221002.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 2001221019974 and 2001221020001.

It is not an unprimeable number, because it can be changed into a prime (2001221020013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 92672653 + ... + 92694244.

It is an arithmetic number, because the mean of its divisors is an integer number (291952864350).

Almost surely, 2^{2001221020012} is an apocalyptic number.

It is an amenable number.

2001221020012 is a deficient number, since it is larger than the sum of its proper divisors (1502213352188).

2001221020012 is a wasteful number, since it uses less digits than its factorization.

2001221020012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185369600 (or 185369598 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 2001221020012 its reverse (2100201221002), we get a palindrome (4101422241014).

The spelling of 2001221020012 in words is "two trillion, one billion, two hundred twenty-one million, twenty thousand, twelve".