102101120201021 has 2 divisors, whose sum is σ = 102101120201022. Its totient is φ = 102101120201020.

The previous prime is 102101120200927. The next prime is 102101120201051. The reversal of 102101120201021 is 120102021101201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 83076571183225 + 19024549017796 = 9114635^2 + 4361714^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102101120201021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 102101120200987 and 102101120201005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102101120201051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51050560100510 + 51050560100511.

It is an arithmetic number, because the mean of its divisors is an integer number (51050560100511).

Almost surely, 2^{102101120201021} is an apocalyptic number.

It is an amenable number.

102101120201021 is a deficient number, since it is larger than the sum of its proper divisors (1).

102101120201021 is an equidigital number, since it uses as much as digits as its factorization.

102101120201021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 102101120201021 its reverse (120102021101201), we get a palindrome (222203141302222).

The spelling of 102101120201021 in words is "one hundred two trillion, one hundred one billion, one hundred twenty million, two hundred one thousand, twenty-one".