21323133031 has 8 divisors (see below), whose sum is σ = 23305739904. Its totient is φ = 19421448960.

The previous prime is 21323132993. The next prime is 21323133061. The reversal of 21323133031 is 13033132312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21323133031 is a prime.

It is a super-2 number, since 2×21323133031² (a number of 21 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 = 21323132993 and 21323133011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21323133061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20230150 + ... + 20231203.

It is an arithmetic number, because the mean of its divisors is an integer number (2913217488).

Almost surely, 2^21323133031 is an apocalyptic number.

21323133031 is a deficient number, since it is larger than the sum of its proper divisors (1982606873).

21323133031 is a wasteful number, since it uses less digits than its factorization.

21323133031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40461401.

The product of its (nonzero) digits is 972, while the sum is 22.

Adding to 21323133031 its reverse (13033132312), we get a palindrome (34356265343).

The spelling of 21323133031 in words is "twenty-one billion, three hundred twenty-three million, one hundred thirty-three thousand, thirty-one".