21220211111210 has 16 divisors (see below), whose sum is σ = 39009068937216. Its totient is φ = 8307486902928.

The previous prime is 21220211111179. The next prime is 21220211111237. The reversal of 21220211111210 is 1211111202212.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22574692202 + ... + 22574693141.

It is an arithmetic number, because the mean of its divisors is an integer number (2438066808576).

Almost surely, 2^{21220211111210} is an apocalyptic number.

21220211111210 is a deficient number, since it is larger than the sum of its proper divisors (17788857826006).

21220211111210 is a wasteful number, since it uses less digits than its factorization.

21220211111210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45149385397.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 21220211111210 its reverse (1211111202212), we get a palindrome (22431322313422).

The spelling of 21220211111210 in words is "twenty-one trillion, two hundred twenty billion, two hundred eleven million, one hundred eleven thousand, two hundred ten".