1255120102111 has 4 divisors (see below), whose sum is σ = 1258737163272. Its totient is φ = 1251503040952.

The previous prime is 1255120102021. The next prime is 1255120102123. The reversal of 1255120102111 is 1112010215521.

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 1255120102111 - 2³¹ = 1252972618463 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1255120102141) 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, 1808530060 + ... + 1808530753.

It is an arithmetic number, because the mean of its divisors is an integer number (314684290818).

Almost surely, 2^{1255120102111} is an apocalyptic number.

1255120102111 is a deficient number, since it is larger than the sum of its proper divisors (3617061161).

1255120102111 is an equidigital number, since it uses as much as digits as its factorization.

1255120102111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3617061160.

The product of its (nonzero) digits is 200, while the sum is 22.

Adding to 1255120102111 its reverse (1112010215521), we get a palindrome (2367130317632).

The spelling of 1255120102111 in words is "one trillion, two hundred fifty-five billion, one hundred twenty million, one hundred two thousand, one hundred eleven".