21211001201023 has 4 divisors (see below), whose sum is σ = 21211098887160. Its totient is φ = 21210903514888.

The previous prime is 21211001201009. The next prime is 21211001201081. The reversal of 21211001201023 is 32010210011212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21211001201023 - 2²¹ = 21210999103871 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21211001200988 and 21211001201006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21211001201003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48516640 + ... + 48951877.

It is an arithmetic number, because the mean of its divisors is an integer number (5302774721790).

Almost surely, 2^{21211001201023} is an apocalyptic number.

21211001201023 is a deficient number, since it is larger than the sum of its proper divisors (97686137).

21211001201023 is an equidigital number, since it uses as much as digits as its factorization.

21211001201023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97686136.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 21211001201023 its reverse (32010210011212), we get a palindrome (53221211212235).

The spelling of 21211001201023 in words is "twenty-one trillion, two hundred eleven billion, one million, two hundred one thousand, twenty-three".