21011012110222 has 4 divisors (see below), whose sum is σ = 31516518165336. Its totient is φ = 10505506055110.

The previous prime is 21011012110213. The next prime is 21011012110223. The reversal of 21011012110222 is 22201121011012.

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 = 21011012110196 and 21011012110205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21011012110223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5252753027554 + ... + 5252753027557.

It is an arithmetic number, because the mean of its divisors is an integer number (7879129541334).

Almost surely, 2^{21011012110222} is an apocalyptic number.

21011012110222 is a deficient number, since it is larger than the sum of its proper divisors (10505506055114).

21011012110222 is a wasteful number, since it uses less digits than its factorization.

21011012110222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10505506055113.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21011012110222 its reverse (22201121011012), we get a palindrome (43212133121234).

The spelling of 21011012110222 in words is "twenty-one trillion, eleven billion, twelve million, one hundred ten thousand, two hundred twenty-two".