100203020221 has 4 divisors (see below), whose sum is σ = 103435375744. Its totient is φ = 96970664700.

The previous prime is 100203020207. The next prime is 100203020231. The reversal of 100203020221 is 122020302001.

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, and also an emirpimes, since its reverse is a distinct semiprime: 122020302001 = 13 ⋅9386177077.

It is a cyclic number.

It is not a de Polignac number, because 100203020221 - 2¹³ = 100203012029 is a prime.

It is a super-2 number, since 2×100203020221² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100203020231) 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, 1616177715 + ... + 1616177776.

It is an arithmetic number, because the mean of its divisors is an integer number (25858843936).

Almost surely, 2^100203020221 is an apocalyptic number.

It is an amenable number.

100203020221 is a deficient number, since it is larger than the sum of its proper divisors (3232355523).

100203020221 is an equidigital number, since it uses as much as digits as its factorization.

100203020221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3232355522.

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 100203020221 its reverse (122020302001), we get a palindrome (222223322222).

The spelling of 100203020221 in words is "one hundred billion, two hundred three million, twenty thousand, two hundred twenty-one".