1212000022001 has 4 divisors (see below), whose sum is σ = 1216715975652. Its totient is φ = 1207284068352.

The previous prime is 1212000021983. The next prime is 1212000022007. The reversal of 1212000022001 is 1002200002121.

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 593787371776 + 618212650225 = 770576^2 + 786265^2 .

It is a cyclic number.

It is not a de Polignac number, because 1212000022001 - 2⁶ = 1212000021937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1212000022007) 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, 2357976440 + ... + 2357976953.

It is an arithmetic number, because the mean of its divisors is an integer number (304178993913).

Almost surely, 2^{1212000022001} is an apocalyptic number.

It is an amenable number.

1212000022001 is a deficient number, since it is larger than the sum of its proper divisors (4715953651).

1212000022001 is an equidigital number, since it uses as much as digits as its factorization.

1212000022001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4715953650.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 1212000022001 its reverse (1002200002121), we get a palindrome (2214200024122).

The spelling of 1212000022001 in words is "one trillion, two hundred twelve billion, twenty-two thousand, one".