110021012020021 has 4 divisors (see below), whose sum is σ = 111346566381792. Its totient is φ = 108695457658252.

The previous prime is 110021012019953. The next prime is 110021012020027. The reversal of 110021012020021 is 120020210120011.

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 a de Polignac number, because none of the positive numbers 2^k-110021012020021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 110021012019983 and 110021012020010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (110021012020027) 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, 662777180761 + ... + 662777180926.

It is an arithmetic number, because the mean of its divisors is an integer number (27836641595448).

Almost surely, 2^{110021012020021} is an apocalyptic number.

It is an amenable number.

110021012020021 is a deficient number, since it is larger than the sum of its proper divisors (1325554361771).

110021012020021 is an equidigital number, since it uses as much as digits as its factorization.

110021012020021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1325554361770.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 110021012020021 its reverse (120020210120011), we get a palindrome (230041222140032).

The spelling of 110021012020021 in words is "one hundred ten trillion, twenty-one billion, twelve million, twenty thousand, twenty-one".