122221400444 has 24 divisors (see below), whose sum is σ = 251280362928. Its totient is φ = 51281706240.

The previous prime is 122221400393. The next prime is 122221400449. The reversal of 122221400444 is 444004122221.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122221400449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 106836317 + ... + 106837460.

It is an arithmetic number, because the mean of its divisors is an integer number (10470015122).

Almost surely, 2^122221400444 is an apocalyptic number.

It is an amenable number.

122221400444 is an abundant number, since it is smaller than the sum of its proper divisors (129058962484).

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

122221400444 is a wasteful number, since it uses less digits than its factorization.

122221400444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213673805 (or 213673803 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 26.

Adding to 122221400444 its reverse (444004122221), we get a palindrome (566225522665).

The spelling of 122221400444 in words is "one hundred twenty-two billion, two hundred twenty-one million, four hundred thousand, four hundred forty-four".