20001222010111 has 32 divisors (see below), whose sum is σ = 22347624600000. Its totient is φ = 17789762764800.

The previous prime is 20001222009961. The next prime is 20001222010129. The reversal of 20001222010111 is 11101022210002.

It is a cyclic number.

It is not a de Polignac number, because 20001222010111 - 2²¹ = 20001219912959 is a prime.

It is a super-2 number, since 2×20001222010111² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20001222010091 and 20001222010100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20001222010181) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 242418381 + ... + 242500873.

It is an arithmetic number, because the mean of its divisors is an integer number (698363268750).

Almost surely, 2^{20001222010111} is an apocalyptic number.

20001222010111 is a deficient number, since it is larger than the sum of its proper divisors (2346402589889).

20001222010111 is a wasteful number, since it uses less digits than its factorization.

20001222010111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84379.

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

Adding to 20001222010111 its reverse (11101022210002), we get a palindrome (31102244220113).

The spelling of 20001222010111 in words is "twenty trillion, one billion, two hundred twenty-two million, ten thousand, one hundred eleven".