1211011222003 has 24 divisors (see below), whose sum is σ = 1395407684160. Its totient is φ = 1042143453360.

The previous prime is 1211011221971. The next prime is 1211011222009. The reversal of 1211011222003 is 3002221101121.

It is not a de Polignac number, because 1211011222003 - 2⁵ = 1211011221971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1211011222009) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4878376 + ... + 5120602.

It is an arithmetic number, because the mean of its divisors is an integer number (58141986840).

Almost surely, 2^{1211011222003} is an apocalyptic number.

1211011222003 is a deficient number, since it is larger than the sum of its proper divisors (184396462157).

1211011222003 is a wasteful number, since it uses less digits than its factorization.

1211011222003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243535 (or 243516 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 1211011222003 its reverse (3002221101121), we get a palindrome (4213232323124).

The spelling of 1211011222003 in words is "one trillion, two hundred eleven billion, eleven million, two hundred twenty-two thousand, three".