100220212021 has 2 divisors, whose sum is σ = 100220212022. Its totient is φ = 100220212020.

The previous prime is 100220212007. The next prime is 100220212031. The reversal of 100220212021 is 120212022001.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 94258210225 + 5962001796 = 307015^2 + 77214^2 .

It is an emirp because it is prime and its reverse (120212022001) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 100220212021 - 2⁷ = 100220211893 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 100220211992 and 100220212010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (100220212031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50110106010 + 50110106011.

It is an arithmetic number, because the mean of its divisors is an integer number (50110106011).

Almost surely, 2^100220212021 is an apocalyptic number.

It is an amenable number.

100220212021 is a deficient number, since it is larger than the sum of its proper divisors (1).

100220212021 is an equidigital number, since it uses as much as digits as its factorization.

100220212021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 100220212021 its reverse (120212022001), we get a palindrome (220432234022).

The spelling of 100220212021 in words is "one hundred billion, two hundred twenty million, two hundred twelve thousand, twenty-one".