100022020120021 has 4 divisors (see below), whose sum is σ = 100271451592044. Its totient is φ = 99772588648000.

The previous prime is 100022020120013. The next prime is 100022020120079. The reversal of 100022020120021 is 120021020220001.

It is a happy number.

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 98014950062500 + 2007070057521 = 9900250^2 + 1416711^2 .

It is not a de Polignac number, because 100022020120021 - 2³ = 100022020120013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100022020119983 and 100022020120010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100022020190021) 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, 124715735410 + ... + 124715736211.

It is an arithmetic number, because the mean of its divisors is an integer number (25067862898011).

Almost surely, 2^{100022020120021} is an apocalyptic number.

It is an amenable number.

100022020120021 is a deficient number, since it is larger than the sum of its proper divisors (249431472023).

100022020120021 is an equidigital number, since it uses as much as digits as its factorization.

100022020120021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249431472022.

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

Adding to 100022020120021 its reverse (120021020220001), we get a palindrome (220043040340022).

The spelling of 100022020120021 in words is "one hundred trillion, twenty-two billion, twenty million, one hundred twenty thousand, twenty-one".