202041421 has 4 divisors (see below), whose sum is σ = 212675200. Its totient is φ = 191407644.

The previous prime is 202041377. The next prime is 202041451. The reversal of 202041421 is 124140202.

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: 124140202 = 2 ⋅62070101.

It is a cyclic number.

It is not a de Polignac number, because 202041421 - 2¹⁷ = 201910349 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202041395 and 202041404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202041451) 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, 5316861 + ... + 5316898.

It is an arithmetic number, because the mean of its divisors is an integer number (53168800).

Almost surely, 2^202041421 is an apocalyptic number.

It is an amenable number.

202041421 is a deficient number, since it is larger than the sum of its proper divisors (10633779).

202041421 is a wasteful number, since it uses less digits than its factorization.

202041421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10633778.

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 202041421 is about 14214.1275145540. The cubic root of 202041421 is about 586.7865330933.

Adding to 202041421 its reverse (124140202), we get a palindrome (326181623).

The spelling of 202041421 in words is "two hundred two million, forty-one thousand, four hundred twenty-one".