420101421 has 8 divisors (see below), whose sum is σ = 561741600. Its totient is φ = 279264432.

The previous prime is 420101389. The next prime is 420101459. The reversal of 420101421 is 124101024.

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

It is not a de Polignac number, because 420101421 - 2⁵ = 420101389 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 420101421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420101021) 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, 199575 + ... + 201668.

It is an arithmetic number, because the mean of its divisors is an integer number (70217700).

Almost surely, 2^420101421 is an apocalyptic number.

It is an amenable number.

420101421 is a deficient number, since it is larger than the sum of its proper divisors (141640179).

420101421 is a wasteful number, since it uses less digits than its factorization.

420101421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 401595.

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 420101421 is about 20496.3758015899. The cubic root of 420101421 is about 748.9475139439.

Adding to 420101421 its reverse (124101024), we get a palindrome (544202445).

The spelling of 420101421 in words is "four hundred twenty million, one hundred one thousand, four hundred twenty-one".