401022101 has 4 divisors (see below), whose sum is σ = 401569932. Its totient is φ = 400474272.

The previous prime is 401022077. The next prime is 401022119. The reversal of 401022101 is 101220104.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 340587025 + 60435076 = 18455^2 + 7774^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-401022101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401022161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 272816 + ... + 274281.

It is an arithmetic number, because the mean of its divisors is an integer number (100392483).

Almost surely, 2^401022101 is an apocalyptic number.

It is an amenable number.

401022101 is a deficient number, since it is larger than the sum of its proper divisors (547831).

401022101 is an equidigital number, since it uses as much as digits as its factorization.

401022101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 547830.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 401022101 is about 20025.5362225335. The cubic root of 401022101 is about 737.4333413276.

Adding to 401022101 its reverse (101220104), we get a palindrome (502242205).

The spelling of 401022101 in words is "four hundred one million, twenty-two thousand, one hundred one".