21222012011009 has 16 divisors (see below), whose sum is σ = 22967759243520. Its totient is φ = 19565128141440.

The previous prime is 21222012010987. The next prime is 21222012011059. The reversal of 21222012011009 is 90011021022212.

It is a cyclic number.

It is not a de Polignac number, because 21222012011009 - 2¹⁶ = 21222011945473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21222012011059) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 189823079 + ... + 189934844.

It is an arithmetic number, because the mean of its divisors is an integer number (1435484952720).

Almost surely, 2^{21222012011009} is an apocalyptic number.

21222012011009 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

21222012011009 is a deficient number, since it is larger than the sum of its proper divisors (1745747232511).

21222012011009 is a wasteful number, since it uses less digits than its factorization.

21222012011009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379758040.

The product of its (nonzero) digits is 288, while the sum is 23.

The spelling of 21222012011009 in words is "twenty-one trillion, two hundred twenty-two billion, twelve million, eleven thousand, nine".