10121210111 has 8 divisors (see below), whose sum is σ = 10655491200. Its totient is φ = 9587087640.

The previous prime is 10121210107. The next prime is 10121210167. The reversal of 10121210111 is 11101212101.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 10121210111 - 2² = 10121210107 is a prime.

It is a super-2 number, since 2×10121210111² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10121210092 and 10121210101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10121210311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 104870 + ... + 176748.

It is an arithmetic number, because the mean of its divisors is an integer number (1331936400).

Almost surely, 2^10121210111 is an apocalyptic number.

10121210111 is a deficient number, since it is larger than the sum of its proper divisors (534281089).

10121210111 is an equidigital number, since it uses as much as digits as its factorization.

10121210111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79309.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 10121210111 its reverse (11101212101), we get a palindrome (21222422212).

It can be divided in two parts, 101212101 and 11, that multiplied together give a palindrome (1113333111).

The spelling of 10121210111 in words is "ten billion, one hundred twenty-one million, two hundred ten thousand, one hundred eleven".