10111112021 has 4 divisors (see below), whose sum is σ = 10326242112. Its totient is φ = 9895981932.

The previous prime is 10111112017. The next prime is 10111112023. The reversal of 10111112021 is 12021111101.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 10111112021 - 2² = 10111112017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10111111993 and 10111112011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10111112023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 107564975 + ... + 107565068.

It is an arithmetic number, because the mean of its divisors is an integer number (2581560528).

Almost surely, 2^10111112021 is an apocalyptic number.

It is an amenable number.

10111112021 is a deficient number, since it is larger than the sum of its proper divisors (215130091).

10111112021 is an equidigital number, since it uses as much as digits as its factorization.

10111112021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215130090.

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

Adding to 10111112021 its reverse (12021111101), we get a palindrome (22132223122).

The spelling of 10111112021 in words is "ten billion, one hundred eleven million, one hundred twelve thousand, twenty-one".