421112021 has 8 divisors (see below), whose sum is σ = 459547104. Its totient is φ = 382702320.

The previous prime is 421112009. The next prime is 421112023. The reversal of 421112021 is 120211124.

It is a happy number.

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

It is a de Polignac number, because none of the positive numbers 2^k-421112021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 421111987 and 421112005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421112023) 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, 50666 + ... + 58388.

It is an arithmetic number, because the mean of its divisors is an integer number (57443388).

Almost surely, 2^421112021 is an apocalyptic number.

It is an amenable number.

421112021 is a deficient number, since it is larger than the sum of its proper divisors (38435083).

421112021 is a wasteful number, since it uses less digits than its factorization.

421112021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12691.

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 421112021 is about 20521.0141318601. The cubic root of 421112021 is about 749.5475914532.

Adding to 421112021 its reverse (120211124), we get a palindrome (541323145).

The spelling of 421112021 in words is "four hundred twenty-one million, one hundred twelve thousand, twenty-one".