421021010 has 16 divisors (see below), whose sum is σ = 758151576. Its totient is φ = 168338688.

The previous prime is 421021009. The next prime is 421021021. The reversal of 421021010 is 10120124.

It can be written as a sum of positive squares in 4 ways, for example, as 267682321 + 153338689 = 16361^2 + 12383^2 .

It is a super-2 number, since 2×421021010² = 354517381722840200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 421020982 and 421021000.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21704 + ... + 36236.

Almost surely, 2^421021010 is an apocalyptic number.

421021010 is a deficient number, since it is larger than the sum of its proper divisors (337130566).

421021010 is a wasteful number, since it uses less digits than its factorization.

421021010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17437.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 421021010 is about 20518.7965046686. The cubic root of 421021010 is about 749.4935899940.

Adding to 421021010 its reverse (10120124), we get a palindrome (431141134).

The spelling of 421021010 in words is "four hundred twenty-one million, twenty-one thousand, ten".