21021101200122 has 16 divisors (see below), whose sum is σ = 42193979307552. Its totient is φ = 6981737582160.

The previous prime is 21021101200097. The next prime is 21021101200133. The reversal of 21021101200122 is 22100210112012.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6324036004 + ... + 6324039327.

It is an arithmetic number, because the mean of its divisors is an integer number (2637123706722).

Almost surely, 2^{21021101200122} is an apocalyptic number.

21021101200122 is an abundant number, since it is smaller than the sum of its proper divisors (21172878107430).

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

21021101200122 is a wasteful number, since it uses less digits than its factorization.

21021101200122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12648075613.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21021101200122 its reverse (22100210112012), we get a palindrome (43121311312134).

The spelling of 21021101200122 in words is "twenty-one trillion, twenty-one billion, one hundred one million, two hundred thousand, one hundred twenty-two".