100000020122221 has 4 divisors (see below), whose sum is σ = 100000091108512. Its totient is φ = 99999949135932.

The previous prime is 100000020122203. The next prime is 100000020122281. The reversal of 100000020122221 is 122221020000001.

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 not a de Polignac number, because 100000020122221 - 2¹⁷ = 100000019991149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100000020122281) 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, 33336375 + ... + 36212068.

It is an arithmetic number, because the mean of its divisors is an integer number (25000022777128).

Almost surely, 2^{100000020122221} is an apocalyptic number.

It is an amenable number.

100000020122221 is a deficient number, since it is larger than the sum of its proper divisors (70986291).

100000020122221 is an equidigital number, since it uses as much as digits as its factorization.

100000020122221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70986290.

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

Adding to 100000020122221 its reverse (122221020000001), we get a palindrome (222221040122222).

The spelling of 100000020122221 in words is "one hundred trillion, twenty million, one hundred twenty-two thousand, two hundred twenty-one".