11012110021 has 16 divisors (see below), whose sum is σ = 12066522048. Its totient is φ = 9966688000.

The previous prime is 11012110019. The next prime is 11012110061. The reversal of 11012110021 is 12001121011.

It is a cyclic number.

It is not a de Polignac number, because 11012110021 - 2¹ = 11012110019 is a prime.

It is a super-2 number, since 2×11012110021² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11012110001) 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, 2587131 + ... + 2591383.

It is an arithmetic number, because the mean of its divisors is an integer number (754157628).

Almost surely, 2^11012110021 is an apocalyptic number.

11012110021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11012110021 is a deficient number, since it is larger than the sum of its proper divisors (1054412027).

11012110021 is a wasteful number, since it uses less digits than its factorization.

11012110021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5252.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 11012110021 its reverse (12001121011), we get a palindrome (23013231032).

The spelling of 11012110021 in words is "eleven billion, twelve million, one hundred ten thousand, twenty-one".