1211102231013 has 48 divisors (see below), whose sum is σ = 1824446332800. Its totient is φ = 773230469760.

The previous prime is 1211102231011. The next prime is 1211102231029. The reversal of 1211102231013 is 3101322011121.

It is not a de Polignac number, because 1211102231013 - 2¹ = 1211102231011 is a prime.

It is a super-2 number, since 2×1211102231013² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211102231011) 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, 15899448 + ... + 15975438.

It is an arithmetic number, because the mean of its divisors is an integer number (38009298600).

Almost surely, 2^{1211102231013} is an apocalyptic number.

It is an amenable number.

1211102231013 is a deficient number, since it is larger than the sum of its proper divisors (613344101787).

1211102231013 is a wasteful number, since it uses less digits than its factorization.

1211102231013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76522 (or 76519 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 1211102231013 its reverse (3101322011121), we get a palindrome (4312424242134).

The spelling of 1211102231013 in words is "one trillion, two hundred eleven billion, one hundred two million, two hundred thirty-one thousand, thirteen".