401421420020 has 24 divisors (see below), whose sum is σ = 851169306624. Its totient is φ = 159009649056.

The previous prime is 401421419977. The next prime is 401421420047. The reversal of 401421420020 is 20024124104.

It is a super-2 number, since 2×401421420020² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 401421419974 and 401421420001.

It is a congruent number.

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, 97430324 + ... + 97434443.

It is an arithmetic number, because the mean of its divisors is an integer number (35465387776).

Almost surely, 2^401421420020 is an apocalyptic number.

It is an amenable number.

401421420020 is an abundant number, since it is smaller than the sum of its proper divisors (449747886604).

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

401421420020 is a wasteful number, since it uses less digits than its factorization.

401421420020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194864879 (or 194864877 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 401421420020 its reverse (20024124104), we get a palindrome (421445544124).

The spelling of 401421420020 in words is "four hundred one billion, four hundred twenty-one million, four hundred twenty thousand, twenty".