21012112201222 has 8 divisors (see below), whose sum is σ = 31518187772472. Its totient is φ = 10506049610400.

The previous prime is 21012112201183. The next prime is 21012112201271. The reversal of 21012112201222 is 22210221121012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 21012112201222.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4475097 + ... + 7877227.

It is an arithmetic number, because the mean of its divisors is an integer number (3939773471559).

Almost surely, 2^{21012112201222} is an apocalyptic number.

21012112201222 is a deficient number, since it is larger than the sum of its proper divisors (10506075571250).

21012112201222 is a wasteful number, since it uses less digits than its factorization.

21012112201222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6490214.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 21012112201222 its reverse (22210221121012), we get a palindrome (43222333322234).

The spelling of 21012112201222 in words is "twenty-one trillion, twelve billion, one hundred twelve million, two hundred one thousand, two hundred twenty-two".