1021421203 has 4 divisors (see below), whose sum is σ = 1114277688. Its totient is φ = 928564720.

The previous prime is 1021421179. The next prime is 1021421207. The reversal of 1021421203 is 3021241201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3021241201 = 11 ⋅274658291.

It is a cyclic number.

It is not a de Polignac number, because 1021421203 - 2⁹ = 1021420691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1021421207) 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, 46428226 + ... + 46428247.

It is an arithmetic number, because the mean of its divisors is an integer number (278569422).

Almost surely, 2^1021421203 is an apocalyptic number.

1021421203 is a deficient number, since it is larger than the sum of its proper divisors (92856485).

1021421203 is an equidigital number, since it uses as much as digits as its factorization.

1021421203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92856484.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 1021421203 is about 31959.6808964045. The cubic root of 1021421203 is about 1007.0900139019.

Adding to 1021421203 its reverse (3021241201), we get a palindrome (4042662404).

It can be divided in two parts, 1021 and 421203, that added together give a palindrome (422224).

The spelling of 1021421203 in words is "one billion, twenty-one million, four hundred twenty-one thousand, two hundred three".