20121244022 has 16 divisors (see below), whose sum is σ = 33815556432. Its totient is φ = 8898829920.

The previous prime is 20121243917. The next prime is 20121244027. The reversal of 20121244022 is 22044212102.

It is a junction number, because it is equal to n+sod(n) for n = 20121243985 and 20121244003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20121244027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12358673 + ... + 12360300.

It is an arithmetic number, because the mean of its divisors is an integer number (2113472277).

Almost surely, 2^20121244022 is an apocalyptic number.

20121244022 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

20121244022 is a deficient number, since it is larger than the sum of its proper divisors (13694312410).

20121244022 is a wasteful number, since it uses less digits than its factorization.

20121244022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24719023.

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 20121244022 its reverse (22044212102), we get a palindrome (42165456124).

The spelling of 20121244022 in words is "twenty billion, one hundred twenty-one million, two hundred forty-four thousand, twenty-two".