101210454221 has 4 divisors (see below), whose sum is σ = 101652421500. Its totient is φ = 100768486944.

The previous prime is 101210454211. The next prime is 101210454223. The reversal of 101210454221 is 122454012101.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 65030610121 + 36179844100 = 255011^2 + 190210^2 .

It is a cyclic number.

It is not a de Polignac number, because 101210454221 - 2¹⁸ = 101210192077 is a prime.

It is a super-2 number, since 2×101210454221² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101210454223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 220983296 + ... + 220983753.

It is an arithmetic number, because the mean of its divisors is an integer number (25413105375).

Almost surely, 2^101210454221 is an apocalyptic number.

It is an amenable number.

101210454221 is a deficient number, since it is larger than the sum of its proper divisors (441967279).

101210454221 is an equidigital number, since it uses as much as digits as its factorization.

101210454221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 441967278.

The product of its (nonzero) digits is 640, while the sum is 23.

Adding to 101210454221 its reverse (122454012101), we get a palindrome (223664466322).

The spelling of 101210454221 in words is "one hundred one billion, two hundred ten million, four hundred fifty-four thousand, two hundred twenty-one".