21000012110222 has 4 divisors (see below), whose sum is σ = 31500018165336. Its totient is φ = 10500006055110.

The previous prime is 21000012110179. The next prime is 21000012110303. The reversal of 21000012110222 is 22201121000012.

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 = 21000012110197 and 21000012110206.

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, 5250003027554 + ... + 5250003027557.

It is an arithmetic number, because the mean of its divisors is an integer number (7875004541334).

Almost surely, 2^{21000012110222} is an apocalyptic number.

21000012110222 is a deficient number, since it is larger than the sum of its proper divisors (10500006055114).

21000012110222 is a wasteful number, since it uses less digits than its factorization.

21000012110222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10500006055113.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21000012110222 its reverse (22201121000012), we get a palindrome (43201133110234).

The spelling of 21000012110222 in words is "twenty-one trillion, twelve million, one hundred ten thousand, two hundred twenty-two".