11420121142 has 4 divisors (see below), whose sum is σ = 17130181716. Its totient is φ = 5710060570.

The previous prime is 11420121137. The next prime is 11420121157. The reversal of 11420121142 is 24112102411.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2855030284 + ... + 2855030287.

It is an arithmetic number, because the mean of its divisors is an integer number (4282545429).

Almost surely, 2^11420121142 is an apocalyptic number.

11420121142 is a deficient number, since it is larger than the sum of its proper divisors (5710060574).

11420121142 is an equidigital number, since it uses as much as digits as its factorization.

11420121142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5710060573.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 11420121142 its reverse (24112102411), we get a palindrome (35532223553).

The spelling of 11420121142 in words is "eleven billion, four hundred twenty million, one hundred twenty-one thousand, one hundred forty-two".