101621221253 has 2 divisors, whose sum is σ = 101621221254. Its totient is φ = 101621221252.

The previous prime is 101621221201. The next prime is 101621221271. The reversal of 101621221253 is 352122126101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 98469184804 + 3152036449 = 313798^2 + 56143^2 .

It is a cyclic number.

It is not a de Polignac number, because 101621221253 - 2¹⁴ = 101621204869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (101621221153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50810610626 + 50810610627.

It is an arithmetic number, because the mean of its divisors is an integer number (50810610627).

Almost surely, 2^101621221253 is an apocalyptic number.

It is an amenable number.

101621221253 is a deficient number, since it is larger than the sum of its proper divisors (1).

101621221253 is an equidigital number, since it uses as much as digits as its factorization.

101621221253 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 26.

Adding to 101621221253 its reverse (352122126101), we get a palindrome (453743347354).

The spelling of 101621221253 in words is "one hundred one billion, six hundred twenty-one million, two hundred twenty-one thousand, two hundred fifty-three".