21000010112222 has 4 divisors (see below), whose sum is σ = 31500015168336. Its totient is φ = 10500005056110.

The previous prime is 21000010112203. The next prime is 21000010112287. The reversal of 21000010112222 is 22221101000012.

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 = 21000010112197 and 21000010112206.

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, 5250002528054 + ... + 5250002528057.

It is an arithmetic number, because the mean of its divisors is an integer number (7875003792084).

Almost surely, 2^{21000010112222} is an apocalyptic number.

21000010112222 is a deficient number, since it is larger than the sum of its proper divisors (10500005056114).

21000010112222 is a wasteful number, since it uses less digits than its factorization.

21000010112222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10500005056113.

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

Adding to 21000010112222 its reverse (22221101000012), we get a palindrome (43221111112234).

The spelling of 21000010112222 in words is "twenty-one trillion, ten million, one hundred twelve thousand, two hundred twenty-two".