21330223031086 has 4 divisors (see below), whose sum is σ = 31995334546632. Its totient is φ = 10665111515542.

The previous prime is 21330223031041. The next prime is 21330223031087. The reversal of 21330223031086 is 68013032203312.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21330223031087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5332555757770 + ... + 5332555757773.

It is an arithmetic number, because the mean of its divisors is an integer number (7998833636658).

Almost surely, 2^{21330223031086} is an apocalyptic number.

21330223031086 is a deficient number, since it is larger than the sum of its proper divisors (10665111515546).

21330223031086 is a wasteful number, since it uses less digits than its factorization.

21330223031086 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10665111515545.

The product of its (nonzero) digits is 31104, while the sum is 34.

Adding to 21330223031086 its reverse (68013032203312), we get a palindrome (89343255234398).

The spelling of 21330223031086 in words is "twenty-one trillion, three hundred thirty billion, two hundred twenty-three million, thirty-one thousand, eighty-six".