220021022100101 has 4 divisors (see below), whose sum is σ = 223627924101804. Its totient is φ = 216414120098400.

The previous prime is 220021022100097. The next prime is 220021022100119. The reversal of 220021022100101 is 101001220120022.

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 47514469169476 + 172506552930625 = 6893074^2 + 13134175^2 .

It is a cyclic number.

It is not a de Polignac number, because 220021022100101 - 2² = 220021022100097 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220021022100181) 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, 1803451000760 + ... + 1803451000881.

It is an arithmetic number, because the mean of its divisors is an integer number (55906981025451).

Almost surely, 2^{220021022100101} is an apocalyptic number.

It is an amenable number.

220021022100101 is a deficient number, since it is larger than the sum of its proper divisors (3606902001703).

220021022100101 is an equidigital number, since it uses as much as digits as its factorization.

220021022100101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3606902001702.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 220021022100101 its reverse (101001220120022), we get a palindrome (321022242220123).

The spelling of 220021022100101 in words is "two hundred twenty trillion, twenty-one billion, twenty-two million, one hundred thousand, one hundred one".