110100020120021 has 2 divisors, whose sum is σ = 110100020120022. Its totient is φ = 110100020120020.

The previous prime is 110100020119981. The next prime is 110100020120071. The reversal of 110100020120021 is 120021020001011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 79366467993796 + 30733552126225 = 8908786^2 + 5543785^2 .

It is an emirp because it is prime and its reverse (120021020001011) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 110100020120021 - 2¹⁴ = 110100020103637 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 110100020119984 and 110100020120011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (110100020120071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55050010060010 + 55050010060011.

It is an arithmetic number, because the mean of its divisors is an integer number (55050010060011).

Almost surely, 2^{110100020120021} is an apocalyptic number.

It is an amenable number.

110100020120021 is a deficient number, since it is larger than the sum of its proper divisors (1).

110100020120021 is an equidigital number, since it uses as much as digits as its factorization.

110100020120021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 110100020120021 its reverse (120021020001011), we get a palindrome (230121040121032).

The spelling of 110100020120021 in words is "one hundred ten trillion, one hundred billion, twenty million, one hundred twenty thousand, twenty-one".