200134202421 has 4 divisors (see below), whose sum is σ = 266845603232. Its totient is φ = 133422801612.

The previous prime is 200134202407. The next prime is 200134202423. The reversal of 200134202421 is 124202431002.

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 200134202421 - 2⁷ = 200134202293 is a prime.

It is a super-2 number, since 2×200134202421² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200134202423) 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, 33355700401 + ... + 33355700406.

It is an arithmetic number, because the mean of its divisors is an integer number (66711400808).

Almost surely, 2^200134202421 is an apocalyptic number.

It is an amenable number.

200134202421 is a deficient number, since it is larger than the sum of its proper divisors (66711400811).

200134202421 is an equidigital number, since it uses as much as digits as its factorization.

200134202421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66711400810.

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 200134202421 its reverse (124202431002), we get a palindrome (324336633423).

The spelling of 200134202421 in words is "two hundred billion, one hundred thirty-four million, two hundred two thousand, four hundred twenty-one".