20121157510 has 16 divisors (see below), whose sum is σ = 38124298800. Its totient is φ = 7624859616.

The previous prime is 20121157477. The next prime is 20121157513. The reversal of 20121157510 is 1575112102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20121157513) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 52950225 + ... + 52950604.

It is an arithmetic number, because the mean of its divisors is an integer number (2382768675).

Almost surely, 2^20121157510 is an apocalyptic number.

20121157510 is a deficient number, since it is larger than the sum of its proper divisors (18003141290).

20121157510 is a wasteful number, since it uses less digits than its factorization.

20121157510 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105900855.

The product of its (nonzero) digits is 700, while the sum is 25.

Adding to 20121157510 its reverse (1575112102), we get a palindrome (21696269612).

The spelling of 20121157510 in words is "twenty billion, one hundred twenty-one million, one hundred fifty-seven thousand, five hundred ten".