120021001001111 has 4 divisors (see below), whose sum is σ = 137166858286992. Its totient is φ = 102875143715232.

The previous prime is 120021001001039. The next prime is 120021001001113. The reversal of 120021001001111 is 111100100120021.

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

It is a de Polignac number, because none of the positive numbers 2^k-120021001001111 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 120021001001092 and 120021001001101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120021001001113) 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, 8572928642930 + ... + 8572928642943.

It is an arithmetic number, because the mean of its divisors is an integer number (34291714571748).

Almost surely, 2^{120021001001111} is an apocalyptic number.

120021001001111 is a deficient number, since it is larger than the sum of its proper divisors (17145857285881).

120021001001111 is an equidigital number, since it uses as much as digits as its factorization.

120021001001111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17145857285880.

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

Adding to 120021001001111 its reverse (111100100120021), we get a palindrome (231121101121132).

The spelling of 120021001001111 in words is "one hundred twenty trillion, twenty-one billion, one million, one thousand, one hundred eleven".