111021012011 has 48 divisors (see below), whose sum is σ = 144128759040. Its totient is φ = 84663532800.

The previous prime is 111021011999. The next prime is 111021012023. The reversal of 111021012011 is 110210120111.

It is an interprime number because it is at equal distance from previous prime (111021011999) and next prime (111021012023).

It is not a de Polignac number, because 111021012011 - 2⁶ = 111021011947 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111021011983 and 111021012001.

It is not an unprimeable number, because it can be changed into a prime (111021012061) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 11208161 + ... + 11218061.

It is an arithmetic number, because the mean of its divisors is an integer number (3002682480).

Almost surely, 2^111021012011 is an apocalyptic number.

111021012011 is a deficient number, since it is larger than the sum of its proper divisors (33107747029).

111021012011 is a wasteful number, since it uses less digits than its factorization.

111021012011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10564 (or 10557 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 111021012011 its reverse (110210120111), we get a palindrome (221231132122).

The spelling of 111021012011 in words is "one hundred eleven billion, twenty-one million, twelve thousand, eleven".