102202211021 has 2 divisors, whose sum is σ = 102202211022. Its totient is φ = 102202211020.

The previous prime is 102202210987. The next prime is 102202211071. The reversal of 102202211021 is 120112202201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51410574121 + 50791636900 = 226739^2 + 225370^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102202211021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 102202210987 and 102202211005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102202211071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51101105510 + 51101105511.

It is an arithmetic number, because the mean of its divisors is an integer number (51101105511).

Almost surely, 2^102202211021 is an apocalyptic number.

It is an amenable number.

102202211021 is a deficient number, since it is larger than the sum of its proper divisors (1).

102202211021 is an equidigital number, since it uses as much as digits as its factorization.

102202211021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 102202211021 its reverse (120112202201), we get a palindrome (222314413222).

The spelling of 102202211021 in words is "one hundred two billion, two hundred two million, two hundred eleven thousand, twenty-one".