21200121210022 has 8 divisors (see below), whose sum is σ = 31896254872872. Its totient is φ = 10568036252400.

The previous prime is 21200121210017. The next prime is 21200121210029. The reversal of 21200121210022 is 22001212100212.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 21200121209978 and 21200121210005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21200121210029) 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, 16012175479 + ... + 16012176802.

It is an arithmetic number, because the mean of its divisors is an integer number (3987031859109).

Almost surely, 2^{21200121210022} is an apocalyptic number.

21200121210022 is a deficient number, since it is larger than the sum of its proper divisors (10696133662850).

21200121210022 is a wasteful number, since it uses less digits than its factorization.

21200121210022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32024352614.

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

Adding to 21200121210022 its reverse (22001212100212), we get a palindrome (43201333310234).

The spelling of 21200121210022 in words is "twenty-one trillion, two hundred billion, one hundred twenty-one million, two hundred ten thousand, twenty-two".