11110001021 has 16 divisors (see below), whose sum is σ = 12929150976. Its totient is φ = 9350401536.

The previous prime is 11110001017. The next prime is 11110001057. The reversal of 11110001021 is 12010001111.

It is a happy number.

It is not a de Polignac number, because 11110001021 - 2² = 11110001017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11110301021) 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, 21815 + ... + 150651.

It is an arithmetic number, because the mean of its divisors is an integer number (808071936).

Almost surely, 2^11110001021 is an apocalyptic number.

It is an amenable number.

11110001021 is a deficient number, since it is larger than the sum of its proper divisors (1819149955).

11110001021 is a wasteful number, since it uses less digits than its factorization.

11110001021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129068.

The product of its (nonzero) digits is 2, while the sum is 8.

Adding to 11110001021 its reverse (12010001111), we get a palindrome (23120002132).

The spelling of 11110001021 in words is "eleven billion, one hundred ten million, one thousand, twenty-one".