22221211201002 has 144 divisors (see below), whose sum is σ = 53006475019680. Its totient is φ = 6722804088000.

The previous prime is 22221211200977. The next prime is 22221211201003. The reversal of 22221211201002 is 20010211212222.

It is a happy number.

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

It is not an unprimeable number, because it can be changed into a prime (22221211201003) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 6073026649 + ... + 6073030307.

It is an arithmetic number, because the mean of its divisors is an integer number (368100520970).

Almost surely, 2^{22221211201002} is an apocalyptic number.

22221211201002 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 22221211201002, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26503237509840).

22221211201002 is an abundant number, since it is smaller than the sum of its proper divisors (30785263818678).

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

22221211201002 is a wasteful number, since it uses less digits than its factorization.

22221211201002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7441 (or 7427 counting only the distinct ones).

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

Adding to 22221211201002 its reverse (20010211212222), we get a palindrome (42231422413224).

The spelling of 22221211201002 in words is "twenty-two trillion, two hundred twenty-one billion, two hundred eleven million, two hundred one thousand, two".