21200201012122 has 16 divisors (see below), whose sum is σ = 34737431439744. Its totient is φ = 9623623500000.

The previous prime is 21200201012117. The next prime is 21200201012131. The reversal of 21200201012122 is 22121010200212.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21200201012096 and 21200201012105.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 641558379 + ... + 641591422.

It is an arithmetic number, because the mean of its divisors is an integer number (2171089464984).

Almost surely, 2^{21200201012122} is an apocalyptic number.

21200201012122 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21200201012122 is a deficient number, since it is larger than the sum of its proper divisors (13537230427622).

21200201012122 is a wasteful number, since it uses less digits than its factorization.

21200201012122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1283150565.

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

Adding to 21200201012122 its reverse (22121010200212), we get a palindrome (43321211212334).

The spelling of 21200201012122 in words is "twenty-one trillion, two hundred billion, two hundred one million, twelve thousand, one hundred twenty-two".