12121220022 has 16 divisors (see below), whose sum is σ = 24244542000. Its totient is φ = 4040056352.

The previous prime is 12121220021. The next prime is 12121220029. The reversal of 12121220022 is 22002212121.

It is a junction number, because it is equal to n+sod(n) for n = 12121219983 and 12121220010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12121220021) 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, 6897 + ... + 155852.

It is an arithmetic number, because the mean of its divisors is an integer number (1515283875).

Almost surely, 2^12121220022 is an apocalyptic number.

12121220022 is an abundant number, since it is smaller than the sum of its proper divisors (12123321978).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12121220022 is a wasteful number, since it uses less digits than its factorization.

12121220022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175167.

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

Adding to 12121220022 its reverse (22002212121), we get a palindrome (34123432143).

It can be divided in two parts, 12121 and 220022, that multiplied together give a palindrome (2666886662).

The spelling of 12121220022 in words is "twelve billion, one hundred twenty-one million, two hundred twenty thousand, twenty-two".