21220220100010 has 16 divisors (see below), whose sum is σ = 38197526491872. Its totient is φ = 8487836859600.

The previous prime is 21220220099951. The next prime is 21220220100011. The reversal of 21220220100010 is 1000102202212.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21220220100011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31042536 + ... + 31718755.

It is an arithmetic number, because the mean of its divisors is an integer number (2387345405742).

Almost surely, 2^{21220220100010} is an apocalyptic number.

21220220100010 is a deficient number, since it is larger than the sum of its proper divisors (16977306391862).

21220220100010 is a wasteful number, since it uses less digits than its factorization.

21220220100010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62795109.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 21220220100010 its reverse (1000102202212), we get a palindrome (22220322302222).

The spelling of 21220220100010 in words is "twenty-one trillion, two hundred twenty billion, two hundred twenty million, one hundred thousand, ten".