1211233220001 has 48 divisors (see below), whose sum is σ = 2062583862144. Its totient is φ = 670460032512.

The previous prime is 1211233219961. The next prime is 1211233220039. The reversal of 1211233220001 is 1000223321121.

1211233220001 is a `hidden beast` number, since 1 + 211 + 233 + 220 + 0 + 0 + 1 = 666.

It is not a de Polignac number, because 1211233220001 - 2¹⁵ = 1211233187233 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1211233220051) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 615400 + ... + 1673673.

It is an arithmetic number, because the mean of its divisors is an integer number (42970497128).

Almost surely, 2^{1211233220001} is an apocalyptic number.

It is an amenable number.

1211233220001 is a deficient number, since it is larger than the sum of its proper divisors (851350642143).

1211233220001 is a wasteful number, since it uses less digits than its factorization.

1211233220001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2289350 (or 2289347 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 1211233220001 its reverse (1000223321121), we get a palindrome (2211456541122).

The spelling of 1211233220001 in words is "one trillion, two hundred eleven billion, two hundred thirty-three million, two hundred twenty thousand, one".