102020100201221 has 4 divisors (see below), whose sum is σ = 107389579159200. Its totient is φ = 96650621243244.

The previous prime is 102020100201203. The next prime is 102020100201361. The reversal of 102020100201221 is 122102001020201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 102020100201221 - 2⁶ = 102020100201157 is a prime.

It is a super-3 number, since 3×102020100201221³ (a number of 43 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 102020100201196 and 102020100201205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102020100203221) 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, 2684739478961 + ... + 2684739478998.

It is an arithmetic number, because the mean of its divisors is an integer number (26847394789800).

Almost surely, 2^{102020100201221} is an apocalyptic number.

It is an amenable number.

102020100201221 is a deficient number, since it is larger than the sum of its proper divisors (5369478957979).

102020100201221 is an equidigital number, since it uses as much as digits as its factorization.

102020100201221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5369478957978.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 102020100201221 its reverse (122102001020201), we get a palindrome (224122101221422).

The spelling of 102020100201221 in words is "one hundred two trillion, twenty billion, one hundred million, two hundred one thousand, two hundred twenty-one".