21202121001010 has 64 divisors (see below), whose sum is σ = 39884825295360. Its totient is φ = 8099549314560.

The previous prime is 21202121000989. The next prime is 21202121001053. The reversal of 21202121001010 is 1010012120212.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1436548011 + ... + 1436562769.

It is an arithmetic number, because the mean of its divisors is an integer number (623200395240).

Almost surely, 2^{21202121001010} is an apocalyptic number.

21202121001010 is a deficient number, since it is larger than the sum of its proper divisors (18682704294350).

21202121001010 is a wasteful number, since it uses less digits than its factorization.

21202121001010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24043.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 21202121001010 its reverse (1010012120212), we get a palindrome (22212133121222).

The spelling of 21202121001010 in words is "twenty-one trillion, two hundred two billion, one hundred twenty-one million, one thousand, ten".