102103111000021 has 2 divisors, whose sum is σ = 102103111000022. Its totient is φ = 102103111000020.

The previous prime is 102103111000003. The next prime is 102103111000067. The reversal of 102103111000021 is 120000111301201.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69515156880625 + 32587954119396 = 8337575^2 + 5708586^2 .

It is a cyclic number.

It is not a de Polignac number, because 102103111000021 - 2³⁹ = 101553355186133 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 102103110999965 and 102103111000010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102103111090021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51051555500010 + 51051555500011.

It is an arithmetic number, because the mean of its divisors is an integer number (51051555500011).

Almost surely, 2^{102103111000021} is an apocalyptic number.

It is an amenable number.

102103111000021 is a deficient number, since it is larger than the sum of its proper divisors (1).

102103111000021 is an equidigital number, since it uses as much as digits as its factorization.

102103111000021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 102103111000021 its reverse (120000111301201), we get a palindrome (222103222301222).

The spelling of 102103111000021 in words is "one hundred two trillion, one hundred three billion, one hundred eleven million, twenty-one", and thus it is an aban number.