12221220101022 has 24 divisors (see below), whose sum is σ = 27095108132664. Its totient is φ = 3979001893104.

The previous prime is 12221220101021. The next prime is 12221220101053. The reversal of 12221220101022 is 22010102212221.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 12221220100986 and 12221220101004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12221220101021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7894844253 + ... + 7894845800.

It is an arithmetic number, because the mean of its divisors is an integer number (1128962838861).

Almost surely, 2^{12221220101022} is an apocalyptic number.

12221220101022 is an abundant number, since it is smaller than the sum of its proper divisors (14873888031642).

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

12221220101022 is a wasteful number, since it uses less digits than its factorization.

12221220101022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15789690104 (or 15789690101 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 12221220101022 its reverse (22010102212221), we get a palindrome (34231322313243).

It can be divided in two parts, 12221 and 220101022, that multiplied together give a palindrome (2689854589862).

The spelling of 12221220101022 in words is "twelve trillion, two hundred twenty-one billion, two hundred twenty million, one hundred one thousand, twenty-two".