21001200200122 has 32 divisors (see below), whose sum is σ = 32558009882112. Its totient is φ = 10153498615344.

The previous prime is 21001200200089. The next prime is 21001200200131. The reversal of 21001200200122 is 22100200210012.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26780973 + ... + 27553999.

It is an arithmetic number, because the mean of its divisors is an integer number (1017437808816).

Almost surely, 2^{21001200200122} is an apocalyptic number.

21001200200122 is a deficient number, since it is larger than the sum of its proper divisors (11556809681990).

21001200200122 is a wasteful number, since it uses less digits than its factorization.

21001200200122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 776242.

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

Adding to 21001200200122 its reverse (22100200210012), we get a palindrome (43101400410134).

The spelling of 21001200200122 in words is "twenty-one trillion, one billion, two hundred million, two hundred thousand, one hundred twenty-two".