21202220211010 has 8 divisors (see below), whose sum is σ = 38163996379836. Its totient is φ = 8480888084400.

The previous prime is 21202220210957. The next prime is 21202220211019. The reversal of 21202220211010 is 1011202220212.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 20506035232881 + 696184978129 = 4528359^2 + 834377^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (21202220211019) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1060111010541 + ... + 1060111010560.

Almost surely, 2^{21202220211010} is an apocalyptic number.

21202220211010 is a deficient number, since it is larger than the sum of its proper divisors (16961776168826).

21202220211010 is a wasteful number, since it uses less digits than its factorization.

21202220211010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2120222021108.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21202220211010 its reverse (1011202220212), we get a palindrome (22213422431222).

The spelling of 21202220211010 in words is "twenty-one trillion, two hundred two billion, two hundred twenty million, two hundred eleven thousand, ten".