21011122120002 has 32 divisors (see below), whose sum is σ = 48198798989952. Its totient is φ = 5981505623424.

The previous prime is 21011122119973. The next prime is 21011122120007. The reversal of 21011122120002 is 20002122111012.

It is not an unprimeable number, because it can be changed into a prime (21011122120007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 902993443 + ... + 903016710.

It is an arithmetic number, because the mean of its divisors is an integer number (1506212468436).

Almost surely, 2^{21011122120002} is an apocalyptic number.

21011122120002 is an abundant number, since it is smaller than the sum of its proper divisors (27187676869950).

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

21011122120002 is a wasteful number, since it uses less digits than its factorization.

21011122120002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1806010442.

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

Adding to 21011122120002 its reverse (20002122111012), we get a palindrome (41013244231014).

The spelling of 21011122120002 in words is "twenty-one trillion, eleven billion, one hundred twenty-two million, one hundred twenty thousand, two".