1211102223123 has 16 divisors (see below), whose sum is σ = 1743862659840. Its totient is φ = 743217640224.

The previous prime is 1211102223109. The next prime is 1211102223127. The reversal of 1211102223123 is 3213222011121.

It is not a de Polignac number, because 1211102223123 - 2⁵ = 1211102223091 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1211102223123.

It is not an unprimeable number, because it can be changed into a prime (1211102223127) 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, 43236561 + ... + 43264562.

It is an arithmetic number, because the mean of its divisors is an integer number (108991416240).

Almost surely, 2^{1211102223123} is an apocalyptic number.

1211102223123 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1211102223123 is a deficient number, since it is larger than the sum of its proper divisors (532760436717).

1211102223123 is a wasteful number, since it uses less digits than its factorization.

1211102223123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86501498.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 1211102223123 its reverse (3213222011121), we get a palindrome (4424324234244).

The spelling of 1211102223123 in words is "one trillion, two hundred eleven billion, one hundred two million, two hundred twenty-three thousand, one hundred twenty-three".