21210102010220 has 12 divisors (see below), whose sum is σ = 44541214221504. Its totient is φ = 8484040804080.

The previous prime is 21210102010219. The next prime is 21210102010241. The reversal of 21210102010220 is 2201020101212.

It is a junction number, because it is equal to n+sod(n) for n = 21210102010195 and 21210102010204.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 530252550236 + ... + 530252550275.

It is an arithmetic number, because the mean of its divisors is an integer number (3711767851792).

Almost surely, 2^{21210102010220} is an apocalyptic number.

21210102010220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21210102010220 is an abundant number, since it is smaller than the sum of its proper divisors (23331112211284).

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

21210102010220 is a wasteful number, since it uses less digits than its factorization.

21210102010220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1060505100520 (or 1060505100518 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21210102010220 its reverse (2201020101212), we get a palindrome (23411122111432).

The spelling of 21210102010220 in words is "twenty-one trillion, two hundred ten billion, one hundred two million, ten thousand, two hundred twenty".