20122222011 has 16 divisors (see below), whose sum is σ = 27137261568. Its totient is φ = 13261752000.

The previous prime is 20122221929. The next prime is 20122222013. The reversal of 20122222011 is 11022222102.

It is not a de Polignac number, because 20122222011 - 2⁹ = 20122221499 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20122222013) 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, 13086 + ... + 201036.

It is an arithmetic number, because the mean of its divisors is an integer number (1696078848).

Almost surely, 2^20122222011 is an apocalyptic number.

20122222011 is a deficient number, since it is larger than the sum of its proper divisors (7015039557).

20122222011 is a wasteful number, since it uses less digits than its factorization.

20122222011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188362.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 20122222011 its reverse (11022222102), we get a palindrome (31144444113).

Subtracting from 20122222011 its reverse (11022222102), we obtain a palindrome (9099999909).

The spelling of 20122222011 in words is "twenty billion, one hundred twenty-two million, two hundred twenty-two thousand, eleven".