21333011123213 has 16 divisors (see below), whose sum is σ = 21701610168000. Its totient is φ = 20967531436800.

The previous prime is 21333011123197. The next prime is 21333011123243. The reversal of 21333011123213 is 31232111033312.

It is a cyclic number.

It is not a de Polignac number, because 21333011123213 - 2⁴ = 21333011123197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21333011123243) 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, 135383570 + ... + 135541052.

It is an arithmetic number, because the mean of its divisors is an integer number (1356350635500).

Almost surely, 2^{21333011123213} is an apocalyptic number.

It is an amenable number.

21333011123213 is a deficient number, since it is larger than the sum of its proper divisors (368599044787).

21333011123213 is a wasteful number, since it uses less digits than its factorization.

21333011123213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167372.

The product of its (nonzero) digits is 1944, while the sum is 26.

Adding to 21333011123213 its reverse (31232111033312), we get a palindrome (52565122156525).

The spelling of 21333011123213 in words is "twenty-one trillion, three hundred thirty-three billion, eleven million, one hundred twenty-three thousand, two hundred thirteen".