11211031212203 has 4 divisors (see below), whose sum is σ = 11698467351888. Its totient is φ = 10723595072520.

The previous prime is 11211031212197. The next prime is 11211031212209. The reversal of 11211031212203 is 30221213011211.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (11211031212197) and next prime (11211031212209).

It is a cyclic number.

It is not a de Polignac number, because 11211031212203 - 2³⁰ = 11209957470379 is a prime.

It is a super-2 number, since 2×11211031212203² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11211031212209) 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, 243718069808 + ... + 243718069853.

It is an arithmetic number, because the mean of its divisors is an integer number (2924616837972).

Almost surely, 2^{11211031212203} is an apocalyptic number.

11211031212203 is a deficient number, since it is larger than the sum of its proper divisors (487436139685).

11211031212203 is an equidigital number, since it uses as much as digits as its factorization.

11211031212203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 487436139684.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 11211031212203 its reverse (30221213011211), we get a palindrome (41432244223414).

The spelling of 11211031212203 in words is "eleven trillion, two hundred eleven billion, thirty-one million, two hundred twelve thousand, two hundred three".