21211322201309 has 64 divisors (see below), whose sum is σ = 22196699246592. Its totient is φ = 20260304064000.

The previous prime is 21211322201287. The next prime is 21211322201347. The reversal of 21211322201309 is 90310222311212.

It is a cyclic number.

It is not a de Polignac number, because 21211322201309 - 2¹² = 21211322197213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21211322291309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 31331347079 + ... + 31331347755.

It is an arithmetic number, because the mean of its divisors is an integer number (346823425728).

Almost surely, 2^{21211322201309} is an apocalyptic number.

It is an amenable number.

21211322201309 is a deficient number, since it is larger than the sum of its proper divisors (985377045283).

21211322201309 is a wasteful number, since it uses less digits than its factorization.

21211322201309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1386.

The product of its (nonzero) digits is 2592, while the sum is 29.

The spelling of 21211322201309 in words is "twenty-one trillion, two hundred eleven billion, three hundred twenty-two million, two hundred one thousand, three hundred nine".