381201212202101 has 2 divisors, whose sum is σ = 381201212202102. Its totient is φ = 381201212202100.

The previous prime is 381201212202067. The next prime is 381201212202143. The reversal of 381201212202101 is 101202212102183.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 225556874139601 + 155644338062500 = 15018551^2 + 12475750^2 .

It is an emirp because it is prime and its reverse (101202212102183) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 381201212202101 - 2⁴² = 376803165690997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (381201212202001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190600606101050 + 190600606101051.

It is an arithmetic number, because the mean of its divisors is an integer number (190600606101051).

Almost surely, 2^{381201212202101} is an apocalyptic number.

It is an amenable number.

381201212202101 is a deficient number, since it is larger than the sum of its proper divisors (1).

381201212202101 is an equidigital number, since it uses as much as digits as its factorization.

381201212202101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 768, while the sum is 26.

Adding to 381201212202101 its reverse (101202212102183), we get a palindrome (482403424304284).

The spelling of 381201212202101 in words is "three hundred eighty-one trillion, two hundred one billion, two hundred twelve million, two hundred two thousand, one hundred one".