202110011421 has 4 divisors (see below), whose sum is σ = 269480015232. Its totient is φ = 134740007612.

The previous prime is 202110011413. The next prime is 202110011527. The reversal of 202110011421 is 124110011202.

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 a cyclic number.

It is not a de Polignac number, because 202110011421 - 2³ = 202110011413 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 202110011421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202110013421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33685001901 + ... + 33685001906.

It is an arithmetic number, because the mean of its divisors is an integer number (67370003808).

Almost surely, 2^202110011421 is an apocalyptic number.

It is an amenable number.

202110011421 is a deficient number, since it is larger than the sum of its proper divisors (67370003811).

202110011421 is an equidigital number, since it uses as much as digits as its factorization.

202110011421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67370003810.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 202110011421 its reverse (124110011202), we get a palindrome (326220022623).

The spelling of 202110011421 in words is "two hundred two billion, one hundred ten million, eleven thousand, four hundred twenty-one".