101220220020221 has 4 divisors (see below), whose sum is σ = 101221075132992. Its totient is φ = 101219364907452.

The previous prime is 101220220020169. The next prime is 101220220020251. The reversal of 101220220020221 is 122020022022101.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-101220220020221 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 101220220020221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101220220020251) 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, 427378805 + ... + 427615578.

It is an arithmetic number, because the mean of its divisors is an integer number (25305268783248).

Almost surely, 2^{101220220020221} is an apocalyptic number.

It is an amenable number.

101220220020221 is a deficient number, since it is larger than the sum of its proper divisors (855112771).

101220220020221 is an equidigital number, since it uses as much as digits as its factorization.

101220220020221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 855112770.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 101220220020221 its reverse (122020022022101), we get a palindrome (223240242042322).

The spelling of 101220220020221 in words is "one hundred one trillion, two hundred twenty billion, two hundred twenty million, twenty thousand, two hundred twenty-one".