401501221051 has 8 divisors (see below), whose sum is σ = 458864455680. Its totient is φ = 344139465768.

The previous prime is 401501221049. The next prime is 401501221103. The reversal of 401501221051 is 150122105104.

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

It is not a de Polignac number, because 401501221051 - 2¹ = 401501221049 is a prime.

It is a super-2 number, since 2×401501221051² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (401501221031) 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, 290310 + ... + 941956.

It is an arithmetic number, because the mean of its divisors is an integer number (57358056960).

Almost surely, 2^401501221051 is an apocalyptic number.

401501221051 is a deficient number, since it is larger than the sum of its proper divisors (57363234629).

401501221051 is an equidigital number, since it uses as much as digits as its factorization.

401501221051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 739673.

The product of its (nonzero) digits is 400, while the sum is 22.

Adding to 401501221051 its reverse (150122105104), we get a palindrome (551623326155).

The spelling of 401501221051 in words is "four hundred one billion, five hundred one million, two hundred twenty-one thousand, fifty-one".