21212200000211 has 4 divisors (see below), whose sum is σ = 23140581818424. Its totient is φ = 19283818182000.

The previous prime is 21212200000177. The next prime is 21212200000231. The reversal of 21212200000211 is 11200000221212.

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

It is a cyclic number.

It is not a de Polignac number, because 21212200000211 - 2¹⁴ = 21212199983827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21212200000231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 964190909090 + ... + 964190909111.

It is an arithmetic number, because the mean of its divisors is an integer number (5785145454606).

Almost surely, 2^{21212200000211} is an apocalyptic number.

21212200000211 is a deficient number, since it is larger than the sum of its proper divisors (1928381818213).

21212200000211 is a wasteful number, since it uses less digits than its factorization.

21212200000211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1928381818212.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21212200000211 its reverse (11200000221212), we get a palindrome (32412200221423).

The spelling of 21212200000211 in words is "twenty-one trillion, two hundred twelve billion, two hundred million, two hundred eleven", and thus it is an aban number.