1200220121111 has 16 divisors (see below), whose sum is σ = 1318710032640. Its totient is φ = 1083308642880.

The previous prime is 1200220121059. The next prime is 1200220121137. The reversal of 1200220121111 is 1111210220021.

It is a cyclic number.

It is not a de Polignac number, because 1200220121111 - 2³⁴ = 1183040251927 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200220121411) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1193120 + ... + 1955498.

It is an arithmetic number, because the mean of its divisors is an integer number (82419377040).

Almost surely, 2^{1200220121111} is an apocalyptic number.

1200220121111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1200220121111 is a deficient number, since it is larger than the sum of its proper divisors (118489911529).

1200220121111 is a wasteful number, since it uses less digits than its factorization.

1200220121111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 763414.

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

Adding to 1200220121111 its reverse (1111210220021), we get a palindrome (2311430341132).

The spelling of 1200220121111 in words is "one trillion, two hundred billion, two hundred twenty million, one hundred twenty-one thousand, one hundred eleven".