10121122111 has 4 divisors (see below), whose sum is σ = 10153666224. Its totient is φ = 10088578000.

The previous prime is 10121122093. The next prime is 10121122129. The reversal of 10121122111 is 11122112101.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11122112101 = 47 ⋅236640683.

It is an interprime number because it is at equal distance from previous prime (10121122093) and next prime (10121122129).

It is a cyclic number.

It is not a de Polignac number, because 10121122111 - 2¹¹ = 10121120063 is a prime.

It is a super-2 number, since 2×10121122111² (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 = 10121122091 and 10121122100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10121122181) 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, 16271590 + ... + 16272211.

It is an arithmetic number, because the mean of its divisors is an integer number (2538416556).

Almost surely, 2^10121122111 is an apocalyptic number.

10121122111 is a deficient number, since it is larger than the sum of its proper divisors (32544113).

10121122111 is an equidigital number, since it uses as much as digits as its factorization.

10121122111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32544112.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 10121122111 its reverse (11122112101), we get a palindrome (21243234212).

The spelling of 10121122111 in words is "ten billion, one hundred twenty-one million, one hundred twenty-two thousand, one hundred eleven".