21333011023031 has 4 divisors (see below), whose sum is σ = 21528726720600. Its totient is φ = 21137295325464.

The previous prime is 21333011023013. The next prime is 21333011023057. The reversal of 21333011023031 is 13032011033312.

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 21333011023031 - 2¹⁰ = 21333011022007 is a prime.

It is a super-2 number, since 2×21333011023031² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21333011022988 and 21333011023006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21333011023061) 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, 97857848621 + ... + 97857848838.

It is an arithmetic number, because the mean of its divisors is an integer number (5382181680150).

Almost surely, 2^{21333011023031} is an apocalyptic number.

21333011023031 is a deficient number, since it is larger than the sum of its proper divisors (195715697569).

21333011023031 is a wasteful number, since it uses less digits than its factorization.

21333011023031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195715697568.

The product of its (nonzero) digits is 972, while the sum is 23.

Adding to 21333011023031 its reverse (13032011033312), we get a palindrome (34365022056343).

The spelling of 21333011023031 in words is "twenty-one trillion, three hundred thirty-three billion, eleven million, twenty-three thousand, thirty-one".