12122102100021 has 32 divisors (see below), whose sum is σ = 17122733993088. Its totient is φ = 7601946992640.

The previous prime is 12122102100019. The next prime is 12122102100029. The reversal of 12122102100021 is 12000120122121.

It is not a de Polignac number, because 12122102100021 - 2¹ = 12122102100019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12122102100029) 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, 1323802575 + ... + 1323811731.

It is an arithmetic number, because the mean of its divisors is an integer number (535085437284).

Almost surely, 2^{12122102100021} is an apocalyptic number.

It is an amenable number.

12122102100021 is a deficient number, since it is larger than the sum of its proper divisors (5000631893067).

12122102100021 is a wasteful number, since it uses less digits than its factorization.

12122102100021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20261.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 12122102100021 its reverse (12000120122121), we get a palindrome (24122222222142).

The spelling of 12122102100021 in words is "twelve trillion, one hundred twenty-two billion, one hundred two million, one hundred thousand, twenty-one".