1222121211001 has 16 divisors (see below), whose sum is σ = 1262761353216. Its totient is φ = 1181557800000.

The previous prime is 1222121210957. The next prime is 1222121211007. The reversal of 1222121211001 is 1001121212221.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1222121211001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1222121211007) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 200311851 + ... + 200317951.

It is an arithmetic number, because the mean of its divisors is an integer number (78922584576).

Almost surely, 2^{1222121211001} is an apocalyptic number.

It is an amenable number.

1222121211001 is a deficient number, since it is larger than the sum of its proper divisors (40640142215).

1222121211001 is a wasteful number, since it uses less digits than its factorization.

1222121211001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11304.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 1222121211001 its reverse (1001121212221), we get a palindrome (2223242423222).

The spelling of 1222121211001 in words is "one trillion, two hundred twenty-two billion, one hundred twenty-one million, two hundred eleven thousand, one".