101001299621 has 2 divisors, whose sum is σ = 101001299622. Its totient is φ = 101001299620.

The previous prime is 101001299617. The next prime is 101001299627. The reversal of 101001299621 is 126992100101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62365072900 + 38636226721 = 249730^2 + 196561^2 .

It is an emirp because it is prime and its reverse (126992100101) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 101001299621 - 2² = 101001299617 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101001299627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50500649810 + 50500649811.

It is an arithmetic number, because the mean of its divisors is an integer number (50500649811).

Almost surely, 2^101001299621 is an apocalyptic number.

It is an amenable number.

101001299621 is a deficient number, since it is larger than the sum of its proper divisors (1).

101001299621 is an equidigital number, since it uses as much as digits as its factorization.

101001299621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 32.

Adding to 101001299621 its reverse (126992100101), we get a palindrome (227993399722).

The spelling of 101001299621 in words is "one hundred one billion, one million, two hundred ninety-nine thousand, six hundred twenty-one".