21210202220130 has 256 divisors, whose sum is σ = 71569533726720. Its totient is φ = 4341533644800.

The previous prime is 21210202220117. The next prime is 21210202220131. The reversal of 21210202220130 is 3102220201212.

21210202220130 is a `hidden beast` number, since 2 + 1 + 210 + 202 + 220 + 1 + 30 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (21210202220131) 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 127 ways as a sum of consecutive naturals, for example, 6220591 + ... + 9006450.

It is an arithmetic number, because the mean of its divisors is an integer number (279568491120).

Almost surely, 2^{21210202220130} is an apocalyptic number.

21210202220130 is an abundant number, since it is smaller than the sum of its proper divisors (50359331506590).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21210202220130 is a wasteful number, since it uses less digits than its factorization.

21210202220130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15227142 (or 15227136 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 21210202220130 its reverse (3102220201212), we get a palindrome (24312422421342).

The spelling of 21210202220130 in words is "twenty-one trillion, two hundred ten billion, two hundred two million, two hundred twenty thousand, one hundred thirty".