122221386 has 120 divisors (see below), whose sum is σ = 324021060. Its totient is φ = 34328448.

The previous prime is 122221367. The next prime is 122221387. The reversal of 122221386 is 683122221.

It can be written as a sum of positive squares in 2 ways, for example, as 121550625 + 670761 = 11025^2 + 819^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (122221387) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 706396 + ... + 706568.

Almost surely, 2^122221386 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 122221386, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (162010530).

122221386 is an abundant number, since it is smaller than the sum of its proper divisors (201799674).

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

122221386 is a wasteful number, since it uses less digits than its factorization.

122221386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290 (or 274 counting only the distinct ones).

The product of its digits is 2304, while the sum is 27.

The square root of 122221386 is about 11055.3781482137. The cubic root of 122221386 is about 496.2673858557.

The spelling of 122221386 in words is "one hundred twenty-two million, two hundred twenty-one thousand, three hundred eighty-six".