1200111022121 has 4 divisors (see below), whose sum is σ = 1309212024144. Its totient is φ = 1091010020100.

The previous prime is 1200111022009. The next prime is 1200111022129. The reversal of 1200111022121 is 1212201110021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1200111022121 - 2¹⁰ = 1200111021097 is a prime.

It is a super-2 number, since 2×1200111022121² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1200111022096 and 1200111022105.

It is not an unprimeable number, because it can be changed into a prime (1200111022129) 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, 54550500995 + ... + 54550501016.

It is an arithmetic number, because the mean of its divisors is an integer number (327303006036).

Almost surely, 2^{1200111022121} is an apocalyptic number.

1200111022121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1200111022121 is a deficient number, since it is larger than the sum of its proper divisors (109101002023).

1200111022121 is a wasteful number, since it uses less digits than its factorization.

1200111022121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109101002022.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1200111022121 its reverse (1212201110021), we get a palindrome (2412312132142).

The spelling of 1200111022121 in words is "one trillion, two hundred billion, one hundred eleven million, twenty-two thousand, one hundred twenty-one".