20121213240350 has 24 divisors (see below), whose sum is σ = 38632729424448. Its totient is φ = 7788856737600.

The previous prime is 20121213240341. The next prime is 20121213240377. The reversal of 20121213240350 is 5304231212102.

It is a super-2 number, since 2×20121213240350² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6490712399 + ... + 6490715498.

It is an arithmetic number, because the mean of its divisors is an integer number (1609697059352).

Almost surely, 2^{20121213240350} is an apocalyptic number.

20121213240350 is a deficient number, since it is larger than the sum of its proper divisors (18511516184098).

20121213240350 is a wasteful number, since it uses less digits than its factorization.

20121213240350 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12981427940 (or 12981427935 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

Adding to 20121213240350 its reverse (5304231212102), we get a palindrome (25425444452452).

The spelling of 20121213240350 in words is "twenty trillion, one hundred twenty-one billion, two hundred thirteen million, two hundred forty thousand, three hundred fifty".