10120121011111 has 4 divisors (see below), whose sum is σ = 10248223808800. Its totient is φ = 9992018213424.

The previous prime is 10120121011087. The next prime is 10120121011151. The reversal of 10120121011111 is 11111012102101.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 10120121011111 - 2⁹ = 10120121010599 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10120121011091 and 10120121011100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10120121011151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64051398726 + ... + 64051398883.

It is an arithmetic number, because the mean of its divisors is an integer number (2562055952200).

Almost surely, 2^{10120121011111} is an apocalyptic number.

10120121011111 is a deficient number, since it is larger than the sum of its proper divisors (128102797689).

10120121011111 is an equidigital number, since it uses as much as digits as its factorization.

10120121011111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128102797688.

The product of its (nonzero) digits is 4, while the sum is 13.

Adding to 10120121011111 its reverse (11111012102101), we get a palindrome (21231133113212).

The spelling of 10120121011111 in words is "ten trillion, one hundred twenty billion, one hundred twenty-one million, eleven thousand, one hundred eleven".