1211013003211 has 4 divisors (see below), whose sum is σ = 1321105094424. Its totient is φ = 1100920912000.

The previous prime is 1211013003203. The next prime is 1211013003247. The reversal of 1211013003211 is 1123003101121.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1211013003211 - 2³ = 1211013003203 is a prime.

It is a super-2 number, since 2×1211013003211² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1211013003281) 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, 55046045590 + ... + 55046045611.

It is an arithmetic number, because the mean of its divisors is an integer number (330276273606).

Almost surely, 2^{1211013003211} is an apocalyptic number.

1211013003211 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1211013003211 is a deficient number, since it is larger than the sum of its proper divisors (110092091213).

1211013003211 is a wasteful number, since it uses less digits than its factorization.

1211013003211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110092091212.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 1211013003211 its reverse (1123003101121), we get a palindrome (2334016104332).

The spelling of 1211013003211 in words is "one trillion, two hundred eleven billion, thirteen million, three thousand, two hundred eleven".