11142020121 has 16 divisors (see below), whose sum is σ = 15207608064. Its totient is φ = 7252361424.

The previous prime is 11142020089. The next prime is 11142020137. The reversal of 11142020121 is 12102024111.

It is not a de Polignac number, because 11142020121 - 2⁵ = 11142020089 is a prime.

It is a super-2 number, since 2×11142020121² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11142020121.

It is not an unprimeable number, because it can be changed into a prime (11142020521) 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, 333250 + ... + 365156.

It is an arithmetic number, because the mean of its divisors is an integer number (950475504).

Almost surely, 2^11142020121 is an apocalyptic number.

It is an amenable number.

11142020121 is a deficient number, since it is larger than the sum of its proper divisors (4065587943).

11142020121 is a wasteful number, since it uses less digits than its factorization.

11142020121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34660.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 11142020121 its reverse (12102024111), we get a palindrome (23244044232).

The spelling of 11142020121 in words is "eleven billion, one hundred forty-two million, twenty thousand, one hundred twenty-one".