20122211010221 has 4 divisors (see below), whose sum is σ = 20122679785500. Its totient is φ = 20121742234944.

The previous prime is 20122211010217. The next prime is 20122211010233. The reversal of 20122211010221 is 12201011222102.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6887340100 + 20115323670121 = 82990^2 + 4485011^2 .

It is a cyclic number.

It is not a de Polignac number, because 20122211010221 - 2² = 20122211010217 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20122211010221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20122271010221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 234323246 + ... + 234409103.

It is an arithmetic number, because the mean of its divisors is an integer number (5030669946375).

Almost surely, 2^{20122211010221} is an apocalyptic number.

It is an amenable number.

20122211010221 is a deficient number, since it is larger than the sum of its proper divisors (468775279).

20122211010221 is an equidigital number, since it uses as much as digits as its factorization.

20122211010221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 468775278.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 20122211010221 its reverse (12201011222102), we get a palindrome (32323222232323).

The spelling of 20122211010221 in words is "twenty trillion, one hundred twenty-two billion, two hundred eleven million, ten thousand, two hundred twenty-one".