101721652051 has 2 divisors, whose sum is σ = 101721652052. Its totient is φ = 101721652050.

The previous prime is 101721652033. The next prime is 101721652099. The reversal of 101721652051 is 150256127101.

It is a weak prime.

It is an emirp because it is prime and its reverse (150256127101) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 101721652051 - 2¹⁹ = 101721127763 is a prime.

It is not a weakly prime, because it can be changed into another prime (101721652001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50860826025 + 50860826026.

It is an arithmetic number, because the mean of its divisors is an integer number (50860826026).

Almost surely, 2^101721652051 is an apocalyptic number.

101721652051 is a deficient number, since it is larger than the sum of its proper divisors (1).

101721652051 is an equidigital number, since it uses as much as digits as its factorization.

101721652051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4200, while the sum is 31.

Adding to 101721652051 its reverse (150256127101), we get a palindrome (251977779152).

The spelling of 101721652051 in words is "one hundred one billion, seven hundred twenty-one million, six hundred fifty-two thousand, fifty-one".