122212221010000 has 400 divisors, whose sum is σ = 334631615205888. Its totient is φ = 42822374400000.

The previous prime is 122212221009971. The next prime is 122212221010067. The reversal of 122212221010000 is 10122212221.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (400).

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 794453092 + ... + 794606908.

Almost surely, 2^{122212221010000} is an apocalyptic number.

122212221010000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 122212221010000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (167315807602944).

122212221010000 is an abundant number, since it is smaller than the sum of its proper divisors (212419394195888).

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

122212221010000 is a wasteful number, since it uses less digits than its factorization.

122212221010000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154120 (or 154099 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 122212221010000 its reverse (10122212221), we get a palindrome (122222343222221).

The spelling of 122212221010000 in words is "one hundred twenty-two trillion, two hundred twelve billion, two hundred twenty-one million, ten thousand".