101621221201 has 2 divisors, whose sum is σ = 101621221202. Its totient is φ = 101621221200.

The previous prime is 101621221153. The next prime is 101621221253. The reversal of 101621221201 is 102122126101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 82483265601 + 19137955600 = 287199^2 + 138340^2 .

It is a cyclic number.

It is not a de Polignac number, because 101621221201 - 2¹³ = 101621213009 is a prime.

It is not a weakly prime, because it can be changed into another prime (101621221271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50810610600 + 50810610601.

It is an arithmetic number, because the mean of its divisors is an integer number (50810610601).

Almost surely, 2^101621221201 is an apocalyptic number.

It is an amenable number.

101621221201 is a deficient number, since it is larger than the sum of its proper divisors (1).

101621221201 is an equidigital number, since it uses as much as digits as its factorization.

101621221201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 101621221201 its reverse (102122126101), we get a palindrome (203743347302).

The spelling of 101621221201 in words is "one hundred one billion, six hundred twenty-one million, two hundred twenty-one thousand, two hundred one".