21033012131023 has 16 divisors (see below), whose sum is σ = 21485310479136. Its totient is φ = 20582777113600.

The previous prime is 21033012131003. The next prime is 21033012131029. The reversal of 21033012131023 is 32013121033012.

It is a cyclic number.

It is not a de Polignac number, because 21033012131023 - 2¹³ = 21033012122831 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21033012130985 and 21033012131003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21033012131029) 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, 262370715 + ... + 262450867.

It is an arithmetic number, because the mean of its divisors is an integer number (1342831904946).

Almost surely, 2^{21033012131023} is an apocalyptic number.

21033012131023 is a deficient number, since it is larger than the sum of its proper divisors (452298348113).

21033012131023 is a wasteful number, since it uses less digits than its factorization.

21033012131023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92954.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 21033012131023 its reverse (32013121033012), we get a palindrome (53046133164035).

It can be divided in two parts, 2103301 and 2131023, that added together give a palindrome (4234324).

The spelling of 21033012131023 in words is "twenty-one trillion, thirty-three billion, twelve million, one hundred thirty-one thousand, twenty-three".