22012121000201 has 4 divisors (see below), whose sum is σ = 22012146651972. Its totient is φ = 22012095348432.

The previous prime is 22012121000171. The next prime is 22012121000209. The reversal of 22012121000201 is 10200012121022.

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 11556437074576 + 10455683925625 = 3399476^2 + 3233525^2 .

It is a cyclic number.

It is not a de Polignac number, because 22012121000201 - 2¹⁰ = 22012120999177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22012121000209) 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, 11492510 + ... + 13270343.

It is an arithmetic number, because the mean of its divisors is an integer number (5503036662993).

Almost surely, 2^{22012121000201} is an apocalyptic number.

It is an amenable number.

22012121000201 is a deficient number, since it is larger than the sum of its proper divisors (25651771).

22012121000201 is an equidigital number, since it uses as much as digits as its factorization.

22012121000201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25651770.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 22012121000201 its reverse (10200012121022), we get a palindrome (32212133121223).

The spelling of 22012121000201 in words is "twenty-two trillion, twelve billion, one hundred twenty-one million, two hundred one", and thus it is an aban number.