20100001222021 has 8 divisors (see below), whose sum is σ = 24180452598080. Its totient is φ = 16321805503488.

The previous prime is 20100001222009. The next prime is 20100001222033. The reversal of 20100001222021 is 12022210000102.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20100001222009) and next prime (20100001222033).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20100001222021 - 2¹³ = 20100001213829 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20100001221992 and 20100001222010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20100001222001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75563914236 + ... + 75563914501.

It is an arithmetic number, because the mean of its divisors is an integer number (3022556574760).

Almost surely, 2^{20100001222021} is an apocalyptic number.

It is an amenable number.

20100001222021 is a deficient number, since it is larger than the sum of its proper divisors (4080451376059).

20100001222021 is a wasteful number, since it uses less digits than its factorization.

20100001222021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151127828763.

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

Adding to 20100001222021 its reverse (12022210000102), we get a palindrome (32122211222123).

The spelling of 20100001222021 in words is "twenty trillion, one hundred billion, one million, two hundred twenty-two thousand, twenty-one".