21101001202222 has 4 divisors (see below), whose sum is σ = 31651501803336. Its totient is φ = 10550500601110.

The previous prime is 21101001202163. The next prime is 21101001202249. The reversal of 21101001202222 is 22220210010112.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 21101001202196 and 21101001202205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5275250300554 + ... + 5275250300557.

It is an arithmetic number, because the mean of its divisors is an integer number (7912875450834).

Almost surely, 2^{21101001202222} is an apocalyptic number.

21101001202222 is a deficient number, since it is larger than the sum of its proper divisors (10550500601114).

21101001202222 is a wasteful number, since it uses less digits than its factorization.

21101001202222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10550500601113.

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

Adding to 21101001202222 its reverse (22220210010112), we get a palindrome (43321211212334).

The spelling of 21101001202222 in words is "twenty-one trillion, one hundred one billion, one million, two hundred two thousand, two hundred twenty-two".