11420212123 has 4 divisors (see below), whose sum is σ = 11431531480. Its totient is φ = 11408892768.

The previous prime is 11420212121. The next prime is 11420212129. The reversal of 11420212123 is 32121202411.

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 11420212123 - 2¹ = 11420212121 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 11420212123.

It is not an unprimeable number, because it can be changed into a prime (11420212121) 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, 5658165 + ... + 5660182.

It is an arithmetic number, because the mean of its divisors is an integer number (2857882870).

Almost surely, 2^11420212123 is an apocalyptic number.

11420212123 is a deficient number, since it is larger than the sum of its proper divisors (11319357).

11420212123 is a wasteful number, since it uses less digits than its factorization.

11420212123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11319356.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 11420212123 its reverse (32121202411), we get a palindrome (43541414534).

The spelling of 11420212123 in words is "eleven billion, four hundred twenty million, two hundred twelve thousand, one hundred twenty-three".