2000122111221 has 16 divisors (see below), whose sum is σ = 2877679921536. Its totient is φ = 1228397357376.

The previous prime is 2000122111187. The next prime is 2000122111271. The reversal of 2000122111221 is 1221112210002.

It is not a de Polignac number, because 2000122111221 - 2⁹ = 2000122110709 is a prime.

It is a super-2 number, since 2×2000122111221² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2000122111221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2000122111271) 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, 50959690 + ... + 50998923.

It is an arithmetic number, because the mean of its divisors is an integer number (179854995096).

Almost surely, 2^{2000122111221} is an apocalyptic number.

It is an amenable number.

2000122111221 is a deficient number, since it is larger than the sum of its proper divisors (877557810315).

2000122111221 is a wasteful number, since it uses less digits than its factorization.

2000122111221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101959132.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 2000122111221 its reverse (1221112210002), we get a palindrome (3221234321223).

The spelling of 2000122111221 in words is "two trillion, one hundred twenty-two million, one hundred eleven thousand, two hundred twenty-one".