2001220011986 has 32 divisors (see below), whose sum is σ = 3288230769600. Its totient is φ = 907792159680.

The previous prime is 2001220011983. The next prime is 2001220012013. The reversal of 2001220011986 is 6891100221002.

It is not an unprimeable number, because it can be changed into a prime (2001220011983) 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, 7210121 + ... + 7482531.

It is an arithmetic number, because the mean of its divisors is an integer number (102757211550).

Almost surely, 2^{2001220011986} is an apocalyptic number.

2001220011986 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

2001220011986 is a deficient number, since it is larger than the sum of its proper divisors (1287010757614).

2001220011986 is a wasteful number, since it uses less digits than its factorization.

2001220011986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277274.

The product of its (nonzero) digits is 3456, while the sum is 32.

Adding to 2001220011986 its reverse (6891100221002), we get a palindrome (8892320232988).

The spelling of 2001220011986 in words is "two trillion, one billion, two hundred twenty million, eleven thousand, nine hundred eighty-six".