21201211112002 has 4 divisors (see below), whose sum is σ = 31801816668006. Its totient is φ = 10600605556000.

The previous prime is 21201211111979. The next prime is 21201211112033. The reversal of 21201211112002 is 20021111210212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 21071120328241 + 130090783761 = 4590329^2 + 360681^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 5300302777999 + ... + 5300302778002.

Almost surely, 2^{21201211112002} is an apocalyptic number.

21201211112002 is a deficient number, since it is larger than the sum of its proper divisors (10600605556004).

21201211112002 is a wasteful number, since it uses less digits than its factorization.

21201211112002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10600605556003.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21201211112002 its reverse (20021111210212), we get a palindrome (41222322322214).

The spelling of 21201211112002 in words is "twenty-one trillion, two hundred one billion, two hundred eleven million, one hundred twelve thousand, two".