21211200010 has 256 divisors, whose sum is σ = 53691724800. Its totient is φ = 5818982400.

The previous prime is 21211199987. The next prime is 21211200011. The reversal of 21211200010 is 1000211212.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a self number, because there is not a number n which added to its sum of digits gives 21211200010.

It is not an unprimeable number, because it can be changed into a prime (21211200011) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 25835400 + ... + 25836220.

It is an arithmetic number, because the mean of its divisors is an integer number (209733300).

Almost surely, 2^21211200010 is an apocalyptic number.

21211200010 is an abundant number, since it is smaller than the sum of its proper divisors (32480524790).

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

21211200010 is a wasteful number, since it uses less digits than its factorization.

21211200010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 977.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 21211200010 its reverse (1000211212), we get a palindrome (22211411222).

The spelling of 21211200010 in words is "twenty-one billion, two hundred eleven million, two hundred thousand, ten".