20121159195 has 24 divisors (see below), whose sum is σ = 34885436976. Its totient is φ = 10728589248.

The previous prime is 20121159173. The next prime is 20121159197. The reversal of 20121159195 is 59195112102.

20121159195 is a `hidden beast` number, since 201 + 211 + 59 + 195 = 666.

It is not a de Polignac number, because 20121159195 - 2¹⁶ = 20121093659 is a prime.

It is a super-2 number, since 2×20121159195² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20121159197) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 131892 + ... + 240078.

It is an arithmetic number, because the mean of its divisors is an integer number (1453559874).

Almost surely, 2^20121159195 is an apocalyptic number.

20121159195 is a deficient number, since it is larger than the sum of its proper divisors (14764277781).

20121159195 is a wasteful number, since it uses less digits than its factorization.

20121159195 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112331 (or 112328 counting only the distinct ones).

The product of its (nonzero) digits is 8100, while the sum is 36.

The spelling of 20121159195 in words is "twenty billion, one hundred twenty-one million, one hundred fifty-nine thousand, one hundred ninety-five".