21202110401 has 16 divisors (see below), whose sum is σ = 22386862080. Its totient is φ = 20040580560.

The previous prime is 21202110353. The next prime is 21202110427. The reversal of 21202110401 is 10401120212.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21202110401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21202110701) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 705386 + ... + 734828.

It is an arithmetic number, because the mean of its divisors is an integer number (1399178880).

Almost surely, 2^21202110401 is an apocalyptic number.

It is an amenable number.

21202110401 is a deficient number, since it is larger than the sum of its proper divisors (1184751679).

21202110401 is a wasteful number, since it uses less digits than its factorization.

21202110401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29836.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21202110401 its reverse (10401120212), we get a palindrome (31603230613).

The spelling of 21202110401 in words is "twenty-one billion, two hundred two million, one hundred ten thousand, four hundred one".