1211110212133 has 4 divisors (see below), whose sum is σ = 1217451103488. Its totient is φ = 1204769320780.

The previous prime is 1211110212127. The next prime is 1211110212157. The reversal of 1211110212133 is 3312120111121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1211110212133 - 2²¹ = 1211108114981 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1211110212133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211110212233) 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, 3170445391 + ... + 3170445772.

It is an arithmetic number, because the mean of its divisors is an integer number (304362775872).

Almost surely, 2^{1211110212133} is an apocalyptic number.

It is an amenable number.

1211110212133 is a deficient number, since it is larger than the sum of its proper divisors (6340891355).

1211110212133 is an equidigital number, since it uses as much as digits as its factorization.

1211110212133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6340891354.

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 1211110212133 its reverse (3312120111121), we get a palindrome (4523230323254).

The spelling of 1211110212133 in words is "one trillion, two hundred eleven billion, one hundred ten million, two hundred twelve thousand, one hundred thirty-three".