21001202222210 has 32 divisors (see below), whose sum is σ = 43210446330240. Its totient is φ = 7199083325952.

The previous prime is 21001202222207. The next prime is 21001202222219. The reversal of 21001202222210 is 1222220210012.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21001202222219) 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 15 ways as a sum of consecutive naturals, for example, 27302639 + ... + 28061298.

It is an arithmetic number, because the mean of its divisors is an integer number (1350326447820).

Almost surely, 2^{21001202222210} is an apocalyptic number.

21001202222210 is an abundant number, since it is smaller than the sum of its proper divisors (22209244108030).

21001202222210 is a wasteful number, since it uses less digits than its factorization.

21001202222210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55369370.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 21001202222210 its reverse (1222220210012), we get a palindrome (22223422432222).

The spelling of 21001202222210 in words is "twenty-one trillion, one billion, two hundred two million, two hundred twenty-two thousand, two hundred ten".