2012121221001 has 4 divisors (see below), whose sum is σ = 2682828294672. Its totient is φ = 1341414147332.

The previous prime is 2012121220973. The next prime is 2012121221003. The reversal of 2012121221001 is 1001221212102.

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 2012121221001 - 2⁶ = 2012121220937 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2012121221003) 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, 335353536831 + ... + 335353536836.

It is an arithmetic number, because the mean of its divisors is an integer number (670707073668).

Almost surely, 2^{2012121221001} is an apocalyptic number.

It is an amenable number.

2012121221001 is a deficient number, since it is larger than the sum of its proper divisors (670707073671).

2012121221001 is an equidigital number, since it uses as much as digits as its factorization.

2012121221001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 670707073670.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 2012121221001 its reverse (1001221212102), we get a palindrome (3013342433103).

The spelling of 2012121221001 in words is "two trillion, twelve billion, one hundred twenty-one million, two hundred twenty-one thousand, one".