102012220000021 has 2 divisors, whose sum is σ = 102012220000022. Its totient is φ = 102012220000020.

The previous prime is 102012219999953. The next prime is 102012220000049. The reversal of 102012220000021 is 120000022210201.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 100613237278225 + 1398982721796 = 10030615^2 + 1182786^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102012220000021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 102012219999956 and 102012220000010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102012220000721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51006110000010 + 51006110000011.

It is an arithmetic number, because the mean of its divisors is an integer number (51006110000011).

Almost surely, 2^{102012220000021} is an apocalyptic number.

It is an amenable number.

102012220000021 is a deficient number, since it is larger than the sum of its proper divisors (1).

102012220000021 is an equidigital number, since it uses as much as digits as its factorization.

102012220000021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 102012220000021 its reverse (120000022210201), we get a palindrome (222012242210222).

The spelling of 102012220000021 in words is "one hundred two trillion, twelve billion, two hundred twenty million, twenty-one", and thus it is an aban number.