21101202130 has 16 divisors (see below), whose sum is σ = 38517125184. Its totient is φ = 8321600560.

The previous prime is 21101202127. The next prime is 21101202131. The reversal of 21101202130 is 3120210112.

It is a super-2 number, since 2×21101202130² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21101202130.

It is not an unprimeable number, because it can be changed into a prime (21101202131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14859292 + ... + 14860711.

It is an arithmetic number, because the mean of its divisors is an integer number (2407320324).

Almost surely, 2^21101202130 is an apocalyptic number.

21101202130 is a deficient number, since it is larger than the sum of its proper divisors (17415923054).

21101202130 is a wasteful number, since it uses less digits than its factorization.

21101202130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29720081.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 21101202130 its reverse (3120210112), we get a palindrome (24221412242).

The spelling of 21101202130 in words is "twenty-one billion, one hundred one million, two hundred two thousand, one hundred thirty".