21231313033 has 16 divisors (see below), whose sum is σ = 24316992000. Its totient is φ = 18158846976.

The previous prime is 21231313003. The next prime is 21231313063. The reversal of 21231313033 is 33031313212.

It is an interprime number because it is at equal distance from previous prime (21231313003) and next prime (21231313063).

It is a cyclic number.

It is not a de Polignac number, because 21231313033 - 2²¹ = 21229215881 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21231312995 and 21231313013.

It is not an unprimeable number, because it can be changed into a prime (21231313003) 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, 10619968 + ... + 10621966.

It is an arithmetic number, because the mean of its divisors is an integer number (1519812000).

Almost surely, 2^21231313033 is an apocalyptic number.

It is an amenable number.

21231313033 is a deficient number, since it is larger than the sum of its proper divisors (3085678967).

21231313033 is a wasteful number, since it uses less digits than its factorization.

21231313033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4536.

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

Adding to 21231313033 its reverse (33031313212), we get a palindrome (54262626245).

The spelling of 21231313033 in words is "twenty-one billion, two hundred thirty-one million, three hundred thirteen thousand, thirty-three".