202421243129 has 4 divisors (see below), whose sum is σ = 231338563584. Its totient is φ = 173503922676.

The previous prime is 202421243119. The next prime is 202421243137. The reversal of 202421243129 is 921342124202.

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: 921342124202 = 2 ⋅460671062101.

It is not a de Polignac number, because 202421243129 - 2⁴ = 202421243113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202421243095 and 202421243104.

It is not an unprimeable number, because it can be changed into a prime (202421243119) 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, 14458660217 + ... + 14458660230.

It is an arithmetic number, because the mean of its divisors is an integer number (57834640896).

Almost surely, 2^202421243129 is an apocalyptic number.

It is an amenable number.

202421243129 is a deficient number, since it is larger than the sum of its proper divisors (28917320455).

202421243129 is an equidigital number, since it uses as much as digits as its factorization.

202421243129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28917320454.

The product of its (nonzero) digits is 13824, while the sum is 32.

The spelling of 202421243129 in words is "two hundred two billion, four hundred twenty-one million, two hundred forty-three thousand, one hundred twenty-nine".