121112171652 has 24 divisors (see below), whose sum is σ = 288607729536. Its totient is φ = 39511772128.

The previous prime is 121112171641. The next prime is 121112171689. The reversal of 121112171652 is 256171211121.

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, 107368383 + ... + 107369510.

It is an arithmetic number, because the mean of its divisors is an integer number (12025322064).

Almost surely, 2^121112171652 is an apocalyptic number.

121112171652 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121112171652 is an abundant number, since it is smaller than the sum of its proper divisors (167495557884).

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

121112171652 is a wasteful number, since it uses less digits than its factorization.

121112171652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214737947 (or 214737945 counting only the distinct ones).

The product of its digits is 1680, while the sum is 30.

Adding to 121112171652 its reverse (256171211121), we get a palindrome (377283382773).

The spelling of 121112171652 in words is "one hundred twenty-one billion, one hundred twelve million, one hundred seventy-one thousand, six hundred fifty-two".