401221126460 has 48 divisors (see below), whose sum is σ = 1050469862400. Its totient is φ = 125055935040.

The previous prime is 401221126447. The next prime is 401221126477. The reversal of 401221126460 is 64621122104.

It is a super-4 number, since 4×401221126460⁴ (a number of 48 digits) contains 4444 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 130265060 + ... + 130268139.

It is an arithmetic number, because the mean of its divisors is an integer number (21884788800).

Almost surely, 2^401221126460 is an apocalyptic number.

It is an amenable number.

401221126460 is an abundant number, since it is smaller than the sum of its proper divisors (649248735940).

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

401221126460 is a wasteful number, since it uses less digits than its factorization.

401221126460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260533226 (or 260533224 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 29.

Adding to 401221126460 its reverse (64621122104), we get a palindrome (465842248564).

The spelling of 401221126460 in words is "four hundred one billion, two hundred twenty-one million, one hundred twenty-six thousand, four hundred sixty".