21012220211122 has 64 divisors (see below), whose sum is σ = 36350705664000. Its totient is φ = 8923195926720.

The previous prime is 21012220211089. The next prime is 21012220211123. The reversal of 21012220211122 is 22111202221012.

It is a self number, because there is not a number n which added to its sum of digits gives 21012220211122.

It is not an unprimeable number, because it can be changed into a prime (21012220211123) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2020594879 + ... + 2020605277.

It is an arithmetic number, because the mean of its divisors is an integer number (567979776000).

Almost surely, 2^{21012220211122} is an apocalyptic number.

21012220211122 is a deficient number, since it is larger than the sum of its proper divisors (15338485452878).

21012220211122 is a wasteful number, since it uses less digits than its factorization.

21012220211122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13471.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 21012220211122 its reverse (22111202221012), we get a palindrome (43123422432134).

The spelling of 21012220211122 in words is "twenty-one trillion, twelve billion, two hundred twenty million, two hundred eleven thousand, one hundred twenty-two".