20012212111 has 16 divisors (see below), whose sum is σ = 20792974720. Its totient is φ = 19250304480.

The previous prime is 20012212069. The next prime is 20012212123. The reversal of 20012212111 is 11121221002.

It is a cyclic number.

It is not a de Polignac number, because 20012212111 - 2¹¹ = 20012210063 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20012212091 and 20012212100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20012212151) 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, 550480 + ... + 585706.

It is an arithmetic number, because the mean of its divisors is an integer number (1299560920).

Almost surely, 2^20012212111 is an apocalyptic number.

20012212111 is a deficient number, since it is larger than the sum of its proper divisors (780762609).

20012212111 is a wasteful number, since it uses less digits than its factorization.

20012212111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35494.

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

Adding to 20012212111 its reverse (11121221002), we get a palindrome (31133433113).

The spelling of 20012212111 in words is "twenty billion, twelve million, two hundred twelve thousand, one hundred eleven".