120001002111 has 12 divisors (see below), whose sum is σ = 175921867992. Its totient is φ = 78806627856.

The previous prime is 120001002091. The next prime is 120001002113. The reversal of 120001002111 is 111200100021.

It is a happy number.

It is not a de Polignac number, because 120001002111 - 2¹⁵ = 120000969343 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 120001002093 and 120001002102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120001002113) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 99502716 + ... + 99503921.

It is an arithmetic number, because the mean of its divisors is an integer number (14660155666).

Almost surely, 2^120001002111 is an apocalyptic number.

120001002111 is a deficient number, since it is larger than the sum of its proper divisors (55920865881).

120001002111 is a wasteful number, since it uses less digits than its factorization.

120001002111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199006710 (or 199006707 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 120001002111 its reverse (111200100021), we get a palindrome (231201102132).

The spelling of 120001002111 in words is "one hundred twenty billion, one million, two thousand, one hundred eleven".