12151220522 has 16 divisors (see below), whose sum is σ = 21094344960. Its totient is φ = 5141745648.

The previous prime is 12151220503. The next prime is 12151220531. The reversal of 12151220522 is 22502215121.

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, 5492213 + ... + 5494424.

It is an arithmetic number, because the mean of its divisors is an integer number (1318396560).

Almost surely, 2^12151220522 is an apocalyptic number.

12151220522 is a deficient number, since it is larger than the sum of its proper divisors (8943124438).

12151220522 is a wasteful number, since it uses less digits than its factorization.

12151220522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10986725.

The product of its (nonzero) digits is 800, while the sum is 23.

Adding to 12151220522 its reverse (22502215121), we get a palindrome (34653435643).

The spelling of 12151220522 in words is "twelve billion, one hundred fifty-one million, two hundred twenty thousand, five hundred twenty-two".