12210021012122 has 4 divisors (see below), whose sum is σ = 18315031518186. Its totient is φ = 6105010506060.

The previous prime is 12210021012113. The next prime is 12210021012127. The reversal of 12210021012122 is 22121012001221.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 7693295195041 + 4516725817081 = 2773679^2 + 2125259^2 .

It is a super-2 number, since 2×12210021012122² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12210021012122.

It is not an unprimeable number, because it can be changed into a prime (12210021012127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3052505253029 + ... + 3052505253032.

Almost surely, 2^{12210021012122} is an apocalyptic number.

12210021012122 is a deficient number, since it is larger than the sum of its proper divisors (6105010506064).

12210021012122 is an equidigital number, since it uses as much as digits as its factorization.

12210021012122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6105010506063.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 12210021012122 its reverse (22121012001221), we get a palindrome (34331033013343).

The spelling of 12210021012122 in words is "twelve trillion, two hundred ten billion, twenty-one million, twelve thousand, one hundred twenty-two".