1211023100013 has 16 divisors (see below), whose sum is σ = 1615513536000. Its totient is φ = 806940811440.

The previous prime is 1211023100011. The next prime is 1211023100059. The reversal of 1211023100013 is 3100013201121.

It is a happy number.

It is not a de Polignac number, because 1211023100013 - 2¹ = 1211023100011 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1211023099965 and 1211023100001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211023100011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 66534288 + ... + 66552486.

It is an arithmetic number, because the mean of its divisors is an integer number (100969596000).

Almost surely, 2^{1211023100013} is an apocalyptic number.

It is an amenable number.

1211023100013 is a deficient number, since it is larger than the sum of its proper divisors (404490435987).

1211023100013 is a wasteful number, since it uses less digits than its factorization.

1211023100013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28192.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 1211023100013 its reverse (3100013201121), we get a palindrome (4311036301134).

The spelling of 1211023100013 in words is "one trillion, two hundred eleven billion, twenty-three million, one hundred thousand, thirteen".