421220131 has 8 divisors (see below), whose sum is σ = 433281024. Its totient is φ = 409262280.

The previous prime is 421220113. The next prime is 421220161. The reversal of 421220131 is 131022124.

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 421220131 - 2¹⁷ = 421089059 is a prime.

It is a super-2 number, since 2×421220131² = 354852797519314322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421220161) 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, 17431 + ... + 33856.

It is an arithmetic number, because the mean of its divisors is an integer number (54160128).

Almost surely, 2^421220131 is an apocalyptic number.

421220131 is a deficient number, since it is larger than the sum of its proper divisors (12060893).

421220131 is a wasteful number, since it uses less digits than its factorization.

421220131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51521.

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

The square root of 421220131 is about 20523.6480918963. The cubic root of 421220131 is about 749.6117285098.

Adding to 421220131 its reverse (131022124), we get a palindrome (552242255).

The spelling of 421220131 in words is "four hundred twenty-one million, two hundred twenty thousand, one hundred thirty-one".