2001212021011 has 16 divisors (see below), whose sum is σ = 2310939097600. Its totient is φ = 1697448856320.

The previous prime is 2001212020993. The next prime is 2001212021021. The reversal of 2001212021011 is 1101202121002.

It is not a de Polignac number, because 2001212021011 - 2⁷ = 2001212020883 is a prime.

It is a super-2 number, since 2×2001212021011² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2001212020982 and 2001212021000.

It is not an unprimeable number, because it can be changed into a prime (2001212021021) 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, 6010690 + ... + 6334888.

It is an arithmetic number, because the mean of its divisors is an integer number (144433693600).

Almost surely, 2^{2001212021011} is an apocalyptic number.

2001212021011 is a deficient number, since it is larger than the sum of its proper divisors (309727076589).

2001212021011 is an equidigital number, since it uses as much as digits as its factorization.

2001212021011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 333394.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 2001212021011 its reverse (1101202121002), we get a palindrome (3102414142013).

Subtracting from 2001212021011 its reverse (1101202121002), we obtain a palindrome (900009900009).

The spelling of 2001212021011 in words is "two trillion, one billion, two hundred twelve million, twenty-one thousand, eleven".