20220221211101 has 4 divisors (see below), whose sum is σ = 20244612311100. Its totient is φ = 20195830111104.

The previous prime is 20220221211097. The next prime is 20220221211103. The reversal of 20220221211101 is 10111212202202.

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 4680187063876 + 15540034147225 = 2163374^2 + 3942085^2 .

It is a cyclic number.

It is not a de Polignac number, because 20220221211101 - 2² = 20220221211097 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 20220221211101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20220221211103) 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, 12195548756 + ... + 12195550413.

It is an arithmetic number, because the mean of its divisors is an integer number (5061153077775).

Almost surely, 2^{20220221211101} is an apocalyptic number.

It is an amenable number.

20220221211101 is a deficient number, since it is larger than the sum of its proper divisors (24391099999).

20220221211101 is an equidigital number, since it uses as much as digits as its factorization.

20220221211101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24391099998.

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

Adding to 20220221211101 its reverse (10111212202202), we get a palindrome (30331433413303).

The spelling of 20220221211101 in words is "twenty trillion, two hundred twenty billion, two hundred twenty-one million, two hundred eleven thousand, one hundred one".