2001122621011 has 2 divisors, whose sum is σ = 2001122621012. Its totient is φ = 2001122621010.

The previous prime is 2001122620997. The next prime is 2001122621063. The reversal of 2001122621011 is 1101262211002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2001122621011 - 2²⁷ = 2000988403283 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2001122621011.

It is not a weakly prime, because it can be changed into another prime (2001122621611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000561310505 + 1000561310506.

It is an arithmetic number, because the mean of its divisors is an integer number (1000561310506).

Almost surely, 2^{2001122621011} is an apocalyptic number.

2001122621011 is a deficient number, since it is larger than the sum of its proper divisors (1).

2001122621011 is an equidigital number, since it uses as much as digits as its factorization.

2001122621011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 2001122621011 its reverse (1101262211002), we get a palindrome (3102384832013).

The spelling of 2001122621011 in words is "two trillion, one billion, one hundred twenty-two million, six hundred twenty-one thousand, eleven".