11211220120123 has 8 divisors (see below), whose sum is σ = 11328184707840. Its totient is φ = 11094774223080.

The previous prime is 11211220120097. The next prime is 11211220120157. The reversal of 11211220120123 is 32102102211211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11211220120123 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 11211220120123.

It is not an unprimeable number, because it can be changed into a prime (11211220120183) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 129629215 + ... + 129715672.

It is an arithmetic number, because the mean of its divisors is an integer number (1416023088480).

Almost surely, 2^{11211220120123} is an apocalyptic number.

11211220120123 is a deficient number, since it is larger than the sum of its proper divisors (116964587717).

11211220120123 is a wasteful number, since it uses less digits than its factorization.

11211220120123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259345337.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 11211220120123 its reverse (32102102211211), we get a palindrome (43313322331334).

The spelling of 11211220120123 in words is "eleven trillion, two hundred eleven billion, two hundred twenty million, one hundred twenty thousand, one hundred twenty-three".