10012121191 has 16 divisors (see below), whose sum is σ = 10653451776. Its totient is φ = 9388263456.

The previous prime is 10012121159. The next prime is 10012121267. The reversal of 10012121191 is 19112121001.

It is a cyclic number.

It is not a de Polignac number, because 10012121191 - 2⁵ = 10012121159 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10012121131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1878256 + ... + 1883578.

It is an arithmetic number, because the mean of its divisors is an integer number (665840736).

Almost surely, 2^10012121191 is an apocalyptic number.

10012121191 is a deficient number, since it is larger than the sum of its proper divisors (641330585).

10012121191 is a wasteful number, since it uses less digits than its factorization.

10012121191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6942.

The product of its (nonzero) digits is 36, while the sum is 19.

Adding to 10012121191 its reverse (19112121001), we get a palindrome (29124242192).

The spelling of 10012121191 in words is "ten billion, twelve million, one hundred twenty-one thousand, one hundred ninety-one".