102001301221 has 4 divisors (see below), whose sum is σ = 105518587500. Its totient is φ = 98484014944.

The previous prime is 102001301191. The next prime is 102001301251. The reversal of 102001301221 is 122103100201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 122103100201 = 33563 ⋅3638027.

It is an interprime number because it is at equal distance from previous prime (102001301191) and next prime (102001301251).

It can be written as a sum of positive squares in 2 ways, for example, as 24431253025 + 77570048196 = 156305^2 + 278514^2 .

It is a cyclic number.

It is not a de Polignac number, because 102001301221 - 2¹³ = 102001293029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102001301251) 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, 1758643096 + ... + 1758643153.

It is an arithmetic number, because the mean of its divisors is an integer number (26379646875).

Almost surely, 2^102001301221 is an apocalyptic number.

It is an amenable number.

102001301221 is a deficient number, since it is larger than the sum of its proper divisors (3517286279).

102001301221 is an equidigital number, since it uses as much as digits as its factorization.

102001301221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3517286278.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 102001301221 its reverse (122103100201), we get a palindrome (224104401422).

The spelling of 102001301221 in words is "one hundred two billion, one million, three hundred one thousand, two hundred twenty-one".