1200121122211 has 4 divisors (see below), whose sum is σ = 1309223042424. Its totient is φ = 1091019202000.

The previous prime is 1200121122181. The next prime is 1200121122223. The reversal of 1200121122211 is 1122211210021.

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 1200121122211 - 2¹³ = 1200121114019 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1200121122241) 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, 54550960090 + ... + 54550960111.

It is an arithmetic number, because the mean of its divisors is an integer number (327305760606).

Almost surely, 2^{1200121122211} is an apocalyptic number.

1200121122211 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1200121122211 is a deficient number, since it is larger than the sum of its proper divisors (109101920213).

1200121122211 is a wasteful number, since it uses less digits than its factorization.

1200121122211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109101920212.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 1200121122211 its reverse (1122211210021), we get a palindrome (2322332332232).

The spelling of 1200121122211 in words is "one trillion, two hundred billion, one hundred twenty-one million, one hundred twenty-two thousand, two hundred eleven".