21002414101 has 4 divisors (see below), whose sum is σ = 21218933932. Its totient is φ = 20785894272.

The previous prime is 21002414087. The next prime is 21002414129. The reversal of 21002414101 is 10141420012.

It is a happy number.

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 9110511601 + 11891902500 = 95449^2 + 109050^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21002414101 is a prime.

It is a super-2 number, since 2×21002414101² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21002414201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 108259770 + ... + 108259963.

It is an arithmetic number, because the mean of its divisors is an integer number (5304733483).

Almost surely, 2^21002414101 is an apocalyptic number.

It is an amenable number.

21002414101 is a deficient number, since it is larger than the sum of its proper divisors (216519831).

21002414101 is an equidigital number, since it uses as much as digits as its factorization.

21002414101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216519830.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21002414101 its reverse (10141420012), we get a palindrome (31143834113).

The spelling of 21002414101 in words is "twenty-one billion, two million, four hundred fourteen thousand, one hundred one".