120221011121111 has 4 divisors (see below), whose sum is σ = 120405116804952. Its totient is φ = 120036905437272.

The previous prime is 120221011121063. The next prime is 120221011121153. The reversal of 120221011121111 is 111121110122021.

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 120221011121111 - 2⁴² = 115822964610007 is a prime.

It is a super-2 number, since 2×120221011121111² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 120221011121111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120221011121191) 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, 92052840941 + ... + 92052842246.

It is an arithmetic number, because the mean of its divisors is an integer number (30101279201238).

Almost surely, 2^{120221011121111} is an apocalyptic number.

120221011121111 is a deficient number, since it is larger than the sum of its proper divisors (184105683841).

120221011121111 is an equidigital number, since it uses as much as digits as its factorization.

120221011121111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184105683840.

The product of its (nonzero) digits is 16, while the sum is 17.

Adding to 120221011121111 its reverse (111121110122021), we get a palindrome (231342121243132).

The spelling of 120221011121111 in words is "one hundred twenty trillion, two hundred twenty-one billion, eleven million, one hundred twenty-one thousand, one hundred eleven".