20012210021111 has 16 divisors (see below), whose sum is σ = 24950966664960. Its totient is φ = 15593505607680.

The previous prime is 20012210021099. The next prime is 20012210021113. The reversal of 20012210021111 is 11112001221002.

It is a de Polignac number, because none of the positive numbers 2^k-20012210021111 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20012210021113) 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, 672266 + ... + 6362103.

It is an arithmetic number, because the mean of its divisors is an integer number (1559435416560).

Almost surely, 2^{20012210021111} is an apocalyptic number.

20012210021111 is a deficient number, since it is larger than the sum of its proper divisors (4938756643849).

20012210021111 is a wasteful number, since it uses less digits than its factorization.

20012210021111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7071334.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 20012210021111 its reverse (11112001221002), we get a palindrome (31124211242113).

It can be divided in two parts, 2001221002 and 1111, that multiplied together give a palindrome (2223356533222).

The spelling of 20012210021111 in words is "twenty trillion, twelve billion, two hundred ten million, twenty-one thousand, one hundred eleven".