2111020000021 has 2 divisors, whose sum is σ = 2111020000022. Its totient is φ = 2111020000020.

The previous prime is 2111019999989. The next prime is 2111020000031. The reversal of 2111020000021 is 1200000201112.

It is an a-pointer prime, because the next prime (2111020000031) can be obtained adding 2111020000021 to its sum of digits (10).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2108376600625 + 2643399396 = 1452025^2 + 51414^2 .

It is a cyclic number.

It is not a de Polignac number, because 2111020000021 - 2⁵ = 2111019999989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2111019999962 and 2111020000007.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2111020000031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1055510000010 + 1055510000011.

It is an arithmetic number, because the mean of its divisors is an integer number (1055510000011).

Almost surely, 2^{2111020000021} is an apocalyptic number.

It is an amenable number.

2111020000021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2111020000021 is an equidigital number, since it uses as much as digits as its factorization.

2111020000021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 2111020000021 its reverse (1200000201112), we get a palindrome (3311020201133).

The spelling of 2111020000021 in words is "two trillion, one hundred eleven billion, twenty million, twenty-one", and thus it is an aban number.