157121607012 has 12 divisors (see below), whose sum is σ = 366617083056. Its totient is φ = 52373869000.

The previous prime is 157121607011. The next prime is 157121607061. The reversal of 157121607012 is 210706121751.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (157121607011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6546733614 + ... + 6546733637.

It is an arithmetic number, because the mean of its divisors is an integer number (30551423588).

Almost surely, 2^157121607012 is an apocalyptic number.

157121607012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

157121607012 is an abundant number, since it is smaller than the sum of its proper divisors (209495476044).

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

157121607012 is a wasteful number, since it uses less digits than its factorization.

157121607012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13093467258 (or 13093467256 counting only the distinct ones).

The product of its (nonzero) digits is 5880, while the sum is 33.

Adding to 157121607012 its reverse (210706121751), we get a palindrome (367827728763).

The spelling of 157121607012 in words is "one hundred fifty-seven billion, one hundred twenty-one million, six hundred seven thousand, twelve".