401331011 has 2 divisors, whose sum is σ = 401331012. Its totient is φ = 401331010.

The previous prime is 401330987. The next prime is 401331013. The reversal of 401331011 is 110133104.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-401331011 is a prime.

It is a super-2 number, since 2×401331011² = 322133160780564242, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 401331013, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (401331013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200665505 + 200665506.

It is an arithmetic number, because the mean of its divisors is an integer number (200665506).

Almost surely, 2^401331011 is an apocalyptic number.

401331011 is a deficient number, since it is larger than the sum of its proper divisors (1).

401331011 is an equidigital number, since it uses as much as digits as its factorization.

401331011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 401331011 is about 20033.2476398611. The cubic root of 401331011 is about 737.6226426702.

Adding to 401331011 its reverse (110133104), we get a palindrome (511464115).

The spelling of 401331011 in words is "four hundred one million, three hundred thirty-one thousand, eleven".