10121111213 has 4 divisors (see below), whose sum is σ = 10121374848. Its totient is φ = 10120847580.

The previous prime is 10121111191. The next prime is 10121111219. The reversal of 10121111213 is 31211112101.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 10121111213 - 2¹⁶ = 10121045677 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 (10121111219) 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 3 ways as a sum of consecutive naturals, for example, 61853 + ... + 155138.

It is an arithmetic number, because the mean of its divisors is an integer number (2530343712).

Almost surely, 2^10121111213 is an apocalyptic number.

It is an amenable number.

10121111213 is a deficient number, since it is larger than the sum of its proper divisors (263635).

10121111213 is an equidigital number, since it uses as much as digits as its factorization.

10121111213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263634.

The product of its (nonzero) digits is 12, while the sum is 14.

Adding to 10121111213 its reverse (31211112101), we get a palindrome (41332223314).

The spelling of 10121111213 in words is "ten billion, one hundred twenty-one million, one hundred eleven thousand, two hundred thirteen".