21111133320012 has 48 divisors (see below), whose sum is σ = 50461250364000. Its totient is φ = 6865342179840.

The previous prime is 21111133319999. The next prime is 21111133320037. The reversal of 21111133320012 is 21002333111112.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 87627414 + ... + 87868002.

It is an arithmetic number, because the mean of its divisors is an integer number (1051276049250).

Almost surely, 2^{21111133320012} is an apocalyptic number.

It is an amenable number.

21111133320012 is an abundant number, since it is smaller than the sum of its proper divisors (29350117043988).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21111133320012 is a wasteful number, since it uses less digits than its factorization.

21111133320012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 418986 (or 418984 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 21111133320012 its reverse (21002333111112), we get a palindrome (42113466431124).

The spelling of 21111133320012 in words is "twenty-one trillion, one hundred eleven billion, one hundred thirty-three million, three hundred twenty thousand, twelve".