10121213213 has 4 divisors (see below), whose sum is σ = 10121450400. Its totient is φ = 10120976028.

The previous prime is 10121213209. The next prime is 10121213231. The reversal of 10121213213 is 31231212101.

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, and also an emirpimes, since its reverse is a distinct semiprime: 31231212101 = 23 ⋅1357878787.

It is a cyclic number.

It is not a de Polignac number, because 10121213213 - 2² = 10121213209 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 10121213191 and 10121213200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10121213293) 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, 34895 + ... + 146492.

It is an arithmetic number, because the mean of its divisors is an integer number (2530362600).

Almost surely, 2^10121213213 is an apocalyptic number.

It is an amenable number.

10121213213 is a deficient number, since it is larger than the sum of its proper divisors (237187).

10121213213 is an equidigital number, since it uses as much as digits as its factorization.

10121213213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237186.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 10121213213 its reverse (31231212101), we get a palindrome (41352425314).

The spelling of 10121213213 in words is "ten billion, one hundred twenty-one million, two hundred thirteen thousand, two hundred thirteen".