421102020 has 24 divisors (see below), whose sum is σ = 1179085824. Its totient is φ = 112293856.

The previous prime is 421101979. The next prime is 421102037. The reversal of 421102020 is 20201124.

It is a super-2 number, since 2×421102020² = 354653822496160800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 421101987 and 421102005.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3509124 + ... + 3509243.

It is an arithmetic number, because the mean of its divisors is an integer number (49128576).

Almost surely, 2^421102020 is an apocalyptic number.

It is an amenable number.

421102020 is an abundant number, since it is smaller than the sum of its proper divisors (757983804).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

421102020 is a wasteful number, since it uses less digits than its factorization.

421102020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7018379 (or 7018377 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 421102020 is about 20520.7704533724. The cubic root of 421102020 is about 749.5416577313.

Adding to 421102020 its reverse (20201124), we get a palindrome (441303144).

The spelling of 421102020 in words is "four hundred twenty-one million, one hundred two thousand, twenty".