21211001112002 has 16 divisors (see below), whose sum is σ = 34264308190392. Its totient is φ = 9789583301760.

The previous prime is 21211001111969. The next prime is 21211001112011. The reversal of 21211001112002 is 20021110011212.

It can be written as a sum of positive squares in 4 ways, for example, as 15384131352121 + 5826869759881 = 3922261^2 + 2413891^2 .

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, 2170853 + ... + 6865464.

Almost surely, 2^{21211001112002} is an apocalyptic number.

21211001112002 is a deficient number, since it is larger than the sum of its proper divisors (13053307078390).

21211001112002 is a wasteful number, since it uses less digits than its factorization.

21211001112002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9126613.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 21211001112002 its reverse (20021110011212), we get a palindrome (41232111123214).

The spelling of 21211001112002 in words is "twenty-one trillion, two hundred eleven billion, one million, one hundred twelve thousand, two".