100020222121 has 2 divisors, whose sum is σ = 100020222122. Its totient is φ = 100020222120.

The previous prime is 100020222097. The next prime is 100020222157. The reversal of 100020222121 is 121222020001.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56804048896 + 43216173225 = 238336^2 + 207885^2 .

It is a cyclic number.

It is not a de Polignac number, because 100020222121 - 2¹³ = 100020213929 is a prime.

It is not a weakly prime, because it can be changed into another prime (100020229121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50010111060 + 50010111061.

It is an arithmetic number, because the mean of its divisors is an integer number (50010111061).

Almost surely, 2^100020222121 is an apocalyptic number.

It is an amenable number.

100020222121 is a deficient number, since it is larger than the sum of its proper divisors (1).

100020222121 is an equidigital number, since it uses as much as digits as its factorization.

100020222121 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 100020222121 its reverse (121222020001), we get a palindrome (221242242122).

The spelling of 100020222121 in words is "one hundred billion, twenty million, two hundred twenty-two thousand, one hundred twenty-one".