1010421421 has 4 divisors (see below), whose sum is σ = 1010954844. Its totient is φ = 1009888000.

The previous prime is 1010421323. The next prime is 1010421427. The reversal of 1010421421 is 1241240101.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1241240101 = 1367 ⋅908003.

It can be written as a sum of positive squares in 2 ways, for example, as 24147396 + 986274025 = 4914^2 + 31405^2 .

It is a cyclic number.

It is not a de Polignac number, because 1010421421 - 2⁹ = 1010420909 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1010421395 and 1010421404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1010421427) 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, 263860 + ... + 267661.

It is an arithmetic number, because the mean of its divisors is an integer number (252738711).

Almost surely, 2^1010421421 is an apocalyptic number.

It is an amenable number.

1010421421 is a deficient number, since it is larger than the sum of its proper divisors (533423).

1010421421 is an equidigital number, since it uses as much as digits as its factorization.

1010421421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 533422.

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 1010421421 is about 31787.1266552987. The cubic root of 1010421421 is about 1003.4618090492.

Adding to 1010421421 its reverse (1241240101), we get a palindrome (2251661522).

The spelling of 1010421421 in words is "one billion, ten million, four hundred twenty-one thousand, four hundred twenty-one".