21101122012201 has 32 divisors (see below), whose sum is σ = 27499791661056. Its totient is φ = 15699999744000.

The previous prime is 21101122012163. The next prime is 21101122012249. The reversal of 21101122012201 is 10221022110112.

It is not a de Polignac number, because 21101122012201 - 2¹³ = 21101122004009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21101122112201) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9422040 + ... + 11444521.

It is an arithmetic number, because the mean of its divisors is an integer number (859368489408).

Almost surely, 2^{21101122012201} is an apocalyptic number.

It is an amenable number.

21101122012201 is a deficient number, since it is larger than the sum of its proper divisors (6398669648855).

21101122012201 is a wasteful number, since it uses less digits than its factorization.

21101122012201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20867173.

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

Adding to 21101122012201 its reverse (10221022110112), we get a palindrome (31322144122313).

The spelling of 21101122012201 in words is "twenty-one trillion, one hundred one billion, one hundred twenty-two million, twelve thousand, two hundred one".