101211621613 has 2 divisors, whose sum is σ = 101211621614. Its totient is φ = 101211621612.

The previous prime is 101211621611. The next prime is 101211621671. The reversal of 101211621613 is 316126112101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 75566161449 + 25645460164 = 274893^2 + 160142^2 .

It is a cyclic number.

It is not a de Polignac number, because 101211621613 - 2¹ = 101211621611 is a prime.

Together with 101211621611, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101211621611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50605810806 + 50605810807.

It is an arithmetic number, because the mean of its divisors is an integer number (50605810807).

Almost surely, 2^101211621613 is an apocalyptic number.

It is an amenable number.

101211621613 is a deficient number, since it is larger than the sum of its proper divisors (1).

101211621613 is an equidigital number, since it uses as much as digits as its factorization.

101211621613 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 25.

Adding to 101211621613 its reverse (316126112101), we get a palindrome (417337733714).

The spelling of 101211621613 in words is "one hundred one billion, two hundred eleven million, six hundred twenty-one thousand, six hundred thirteen".