1200002122111 has 8 divisors (see below), whose sum is σ = 1292345198480. Its totient is φ = 1107664077312.

The previous prime is 1200002122103. The next prime is 1200002122127. The reversal of 1200002122111 is 1112212000021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1200002122111 - 2³ = 1200002122103 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1200002122091 and 1200002122100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200002122141) 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 7 ways as a sum of consecutive naturals, for example, 755106 + ... + 1723423.

It is an arithmetic number, because the mean of its divisors is an integer number (161543149810).

Almost surely, 2^{1200002122111} is an apocalyptic number.

1200002122111 is a deficient number, since it is larger than the sum of its proper divisors (92343076369).

1200002122111 is a wasteful number, since it uses less digits than its factorization.

1200002122111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2515785.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1200002122111 its reverse (1112212000021), we get a palindrome (2312214122132).

The spelling of 1200002122111 in words is "one trillion, two hundred billion, two million, one hundred twenty-two thousand, one hundred eleven".