101023321621 has 2 divisors, whose sum is σ = 101023321622. Its totient is φ = 101023321620.

The previous prime is 101023321561. The next prime is 101023321631. The reversal of 101023321621 is 126123320101.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 82065060900 + 18958260721 = 286470^2 + 137689^2 .

It is a cyclic number.

It is not a de Polignac number, because 101023321621 - 2¹⁷ = 101023190549 is a prime.

It is a super-2 number, since 2×101023321621² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 101023321592 and 101023321601.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101023321631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50511660810 + 50511660811.

It is an arithmetic number, because the mean of its divisors is an integer number (50511660811).

Almost surely, 2^101023321621 is an apocalyptic number.

It is an amenable number.

101023321621 is a deficient number, since it is larger than the sum of its proper divisors (1).

101023321621 is an equidigital number, since it uses as much as digits as its factorization.

101023321621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 101023321621 its reverse (126123320101), we get a palindrome (227146641722).

The spelling of 101023321621 in words is "one hundred one billion, twenty-three million, three hundred twenty-one thousand, six hundred twenty-one".