421021011 has 8 divisors (see below), whose sum is σ = 561579264. Its totient is φ = 280571720.

The previous prime is 421021009. The next prime is 421021021. The reversal of 421021011 is 110120124.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 421021011 - 2¹ = 421021009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (421021001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17751 + ... + 34016.

It is an arithmetic number, because the mean of its divisors is an integer number (70197408).

Almost surely, 2^421021011 is an apocalyptic number.

421021011 is a deficient number, since it is larger than the sum of its proper divisors (140558253).

421021011 is a wasteful number, since it uses less digits than its factorization.

421021011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54481.

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 421021011 is about 20518.7965290365. The cubic root of 421021011 is about 749.4935905874.

Adding to 421021011 its reverse (110120124), we get a palindrome (531141135).

The spelling of 421021011 in words is "four hundred twenty-one million, twenty-one thousand, eleven".