20212112222001 has 32 divisors (see below), whose sum is σ = 34439537473280. Its totient is φ = 11476212928128.

The previous prime is 20212112221979. The next prime is 20212112222011. The reversal of 20212112222001 is 10022221121202.

It is a happy number.

20212112222001 is a `hidden beast` number, since 20 + 212 + 11 + 222 + 200 + 1 = 666.

It is not a de Polignac number, because 20212112222001 - 2¹¹ = 20212112219953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20212112222011) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 340551196 + ... + 340610541.

It is an arithmetic number, because the mean of its divisors is an integer number (1076235546040).

Almost surely, 2^{20212112222001} is an apocalyptic number.

20212112222001 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20212112222001 is a deficient number, since it is larger than the sum of its proper divisors (14227425251279).

20212112222001 is a wasteful number, since it uses less digits than its factorization.

20212112222001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 681161910 (or 681161904 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 20212112222001 its reverse (10022221121202), we get a palindrome (30234333343203).

The spelling of 20212112222001 in words is "twenty trillion, two hundred twelve billion, one hundred twelve million, two hundred twenty-two thousand, one".