6121720521412 has 12 divisors (see below), whose sum is σ = 10940947315200. Its totient is φ = 2995735574216.

The previous prime is 6121720521373. The next prime is 6121720521463. The reversal of 6121720521412 is 2141250271216.

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 3 ways as a sum of consecutive naturals, for example, 16281171412 + ... + 16281171787.

It is an arithmetic number, because the mean of its divisors is an integer number (911745609600).

Almost surely, 2^{6121720521412} is an apocalyptic number.

It is an amenable number.

6121720521412 is a deficient number, since it is larger than the sum of its proper divisors (4819226793788).

6121720521412 is a wasteful number, since it uses less digits than its factorization.

6121720521412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32562343250 (or 32562343248 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 34.

Adding to 6121720521412 its reverse (2141250271216), we get a palindrome (8262970792628).

The spelling of 6121720521412 in words is "six trillion, one hundred twenty-one billion, seven hundred twenty million, five hundred twenty-one thousand, four hundred twelve".