421021115 has 8 divisors (see below), whose sum is σ = 505845648. Its totient is φ = 336403360.

The previous prime is 421021103. The next prime is 421021121. The reversal of 421021115 is 511120124.

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

It is not a de Polignac number, because 421021115 - 2¹⁰ = 421020091 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 421021093 and 421021102.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47177 + ... + 55386.

It is an arithmetic number, because the mean of its divisors is an integer number (63230706).

Almost surely, 2^421021115 is an apocalyptic number.

421021115 is a deficient number, since it is larger than the sum of its proper divisors (84824533).

421021115 is a wasteful number, since it uses less digits than its factorization.

421021115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103389.

The product of its (nonzero) digits is 80, while the sum is 17.

The square root of 421021115 is about 20518.7990632980. The cubic root of 421021115 is about 749.4936523003.

Adding to 421021115 its reverse (511120124), we get a palindrome (932141239).

Subtracting 421021115 from its reverse (511120124), we obtain a palindrome (90099009).

The spelling of 421021115 in words is "four hundred twenty-one million, twenty-one thousand, one hundred fifteen".