21202222220212 has 96 divisors (see below), whose sum is σ = 41351093360640. Its totient is φ = 9431452464000.

The previous prime is 21202222220203. The next prime is 21202222220251.

21202222220212 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 311438137 + ... + 311506207.

It is an arithmetic number, because the mean of its divisors is an integer number (430740555840).

Almost surely, 2^{21202222220212} is an apocalyptic number.

21202222220212 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21202222220212 is a deficient number, since it is larger than the sum of its proper divisors (20148871140428).

21202222220212 is a wasteful number, since it uses less digits than its factorization.

21202222220212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68893 (or 68891 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 22.

Multiplying 21202222220212 by its sum of digits (22), we get a palindrome (466448888844664).

It can be divided in two parts, 2120222 and 2220212, that added together give a palindrome (4340434).

The spelling of 21202222220212 in words is "twenty-one trillion, two hundred two billion, two hundred twenty-two million, two hundred twenty thousand, two hundred twelve".