21312011001230 has 16 divisors (see below), whose sum is σ = 38362669423344. Its totient is φ = 8524571151360.

The previous prime is 21312011001191. The next prime is 21312011001251. The reversal of 21312011001230 is 3210011021312.

It is a junction number, because it is equal to n+sod(n) for n = 21312011001199 and 21312011001208.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28772147 + ... + 29503566.

It is an arithmetic number, because the mean of its divisors is an integer number (2397666838959).

Almost surely, 2^{21312011001230} is an apocalyptic number.

21312011001230 is a deficient number, since it is larger than the sum of its proper divisors (17050658422114).

21312011001230 is a wasteful number, since it uses less digits than its factorization.

21312011001230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58312291.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 21312011001230 its reverse (3210011021312), we get a palindrome (24522022022542).

The spelling of 21312011001230 in words is "twenty-one trillion, three hundred twelve billion, eleven million, one thousand, two hundred thirty".