210100401 has 24 divisors (see below), whose sum is σ = 348370880. Its totient is φ = 119524896.

The previous prime is 210100381. The next prime is 210100411. The reversal of 210100401 is 104001012.

It is a happy number.

It is not a de Polignac number, because 210100401 - 2²³ = 201711793 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (210100411) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7146 + ... + 21708.

Almost surely, 2^210100401 is an apocalyptic number.

210100401 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

210100401 is a deficient number, since it is larger than the sum of its proper divisors (138270479).

210100401 is a wasteful number, since it uses less digits than its factorization.

210100401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14805 (or 14802 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 210100401 is about 14494.8404958454. The cubic root of 210100401 is about 594.4869064870.

Adding to 210100401 its reverse (104001012), we get a palindrome (314101413).

The spelling of 210100401 in words is "two hundred ten million, one hundred thousand, four hundred one".