21002211011210 has 128 divisors (see below), whose sum is σ = 48026147871744. Its totient is φ = 6493834690560.

The previous prime is 21002211011207. The next prime is 21002211011219. The reversal of 21002211011210 is 1211011220012.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21002211011219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 8048207 + ... + 10333346.

It is an arithmetic number, because the mean of its divisors is an integer number (375204280248).

Almost surely, 2^{21002211011210} is an apocalyptic number.

21002211011210 is an abundant number, since it is smaller than the sum of its proper divisors (27023936860534).

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

21002211011210 is a wasteful number, since it uses less digits than its factorization.

21002211011210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18381648.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21002211011210 its reverse (1211011220012), we get a palindrome (22213222231222).

The spelling of 21002211011210 in words is "twenty-one trillion, two billion, two hundred eleven million, eleven thousand, two hundred ten".