21120301323121 has 16 divisors (see below), whose sum is σ = 28357327651968. Its totient is φ = 15191425526400.

The previous prime is 21120301323097. The next prime is 21120301323131. The reversal of 21120301323121 is 12132310302112.

It is a cyclic number.

It is not a de Polignac number, because 21120301323121 - 2³¹ = 21118153839473 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21120301323092 and 21120301323101.

It is not an unprimeable number, because it can be changed into a prime (21120301323131) 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 15 ways as a sum of consecutive naturals, for example, 10549600060 + ... + 10549602061.

It is an arithmetic number, because the mean of its divisors is an integer number (1772332978248).

Almost surely, 2^{21120301323121} is an apocalyptic number.

It is an amenable number.

21120301323121 is a deficient number, since it is larger than the sum of its proper divisors (7237026328847).

21120301323121 is a wasteful number, since it uses less digits than its factorization.

21120301323121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21099202152.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 21120301323121 its reverse (12132310302112), we get a palindrome (33252611625233).

The spelling of 21120301323121 in words is "twenty-one trillion, one hundred twenty billion, three hundred one million, three hundred twenty-three thousand, one hundred twenty-one".