1121221001211 has 16 divisors (see below), whose sum is σ = 1560535634208. Its totient is φ = 715355884800.

The previous prime is 1121221001207. The next prime is 1121221001233. The reversal of 1121221001211 is 1121001221211.

It is a happy number.

It is not a de Polignac number, because 1121221001211 - 2² = 1121221001207 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1121221001311) 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, 82789050 + ... + 82802591.

It is an arithmetic number, because the mean of its divisors is an integer number (97533477138).

Almost surely, 2^{1121221001211} is an apocalyptic number.

1121221001211 is a deficient number, since it is larger than the sum of its proper divisors (439314632997).

1121221001211 is a wasteful number, since it uses less digits than its factorization.

1121221001211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165591742.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 1121221001211 its reverse (1121001221211), we get a palindrome (2242222222422).

The spelling of 1121221001211 in words is "one trillion, one hundred twenty-one billion, two hundred twenty-one million, one thousand, two hundred eleven".