401220402011 has 18 divisors (see below), whose sum is σ = 477544323060. Its totient is φ = 336688432080.

The previous prime is 401220401993. The next prime is 401220402049. The reversal of 401220402011 is 110204022104.

It is not a de Polignac number, because 401220402011 - 2⁶ = 401220401947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (401220402071) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 9789821 + ... + 9830718.

It is an arithmetic number, because the mean of its divisors is an integer number (26530240170).

Almost surely, 2^401220402011 is an apocalyptic number.

401220402011 is a deficient number, since it is larger than the sum of its proper divisors (76323921049).

401220402011 is a wasteful number, since it uses less digits than its factorization.

401220402011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19620587 (or 19620563 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 401220402011 its reverse (110204022104), we get a palindrome (511424424115).

The spelling of 401220402011 in words is "four hundred one billion, two hundred twenty million, four hundred two thousand, eleven".