220210211211221 has 16 divisors (see below), whose sum is σ = 281968006496640. Its totient is φ = 166954740684480.

The previous prime is 220210211211217. The next prime is 220210211211233. The reversal of 220210211211221 is 122112112012022.

It is not a de Polignac number, because 220210211211221 - 2² = 220210211211217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 220210211211193 and 220210211211202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220210211211121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38646927866 + ... + 38646933563.

It is an arithmetic number, because the mean of its divisors is an integer number (17623000406040).

Almost surely, 2^{220210211211221} is an apocalyptic number.

It is an amenable number.

220210211211221 is a deficient number, since it is larger than the sum of its proper divisors (61757795285419).

220210211211221 is a wasteful number, since it uses less digits than its factorization.

220210211211221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77293861484.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 220210211211221 its reverse (122112112012022), we get a palindrome (342322323223243).

The spelling of 220210211211221 in words is "two hundred twenty trillion, two hundred ten billion, two hundred eleven million, two hundred eleven thousand, two hundred twenty-one".