1000122220021 has 4 divisors (see below), whose sum is σ = 1014208448544. Its totient is φ = 986035991500.

The previous prime is 1000122220003. The next prime is 1000122220049. The reversal of 1000122220021 is 1200222210001.

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 1000122220021 - 2¹¹ = 1000122217973 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1000122219983 and 1000122220010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000122220061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7043114155 + ... + 7043114296.

It is an arithmetic number, because the mean of its divisors is an integer number (253552112136).

Almost surely, 2^{1000122220021} is an apocalyptic number.

It is an amenable number.

1000122220021 is a deficient number, since it is larger than the sum of its proper divisors (14086228523).

1000122220021 is an equidigital number, since it uses as much as digits as its factorization.

1000122220021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14086228522.

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

Adding to 1000122220021 its reverse (1200222210001), we get a palindrome (2200344430022).

The spelling of 1000122220021 in words is "one trillion, one hundred twenty-two million, two hundred twenty thousand, twenty-one".