1212200110121 has 16 divisors (see below), whose sum is σ = 1627569379968. Its totient is φ = 871912166400.

The previous prime is 1212200110117. The next prime is 1212200110159. The reversal of 1212200110121 is 1210110022121.

It is not a de Polignac number, because 1212200110121 - 2² = 1212200110117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1212200110096 and 1212200110105.

It is not an unprimeable number, because it can be changed into a prime (1212200112121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 605493560 + ... + 605495561.

It is an arithmetic number, because the mean of its divisors is an integer number (101723086248).

Almost surely, 2^{1212200110121} is an apocalyptic number.

1212200110121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1212200110121 is a deficient number, since it is larger than the sum of its proper divisors (415369269847).

1212200110121 is a wasteful number, since it uses less digits than its factorization.

1212200110121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1210989152.

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

Adding to 1212200110121 its reverse (1210110022121), we get a palindrome (2422310132242).

The spelling of 1212200110121 in words is "one trillion, two hundred twelve billion, two hundred million, one hundred ten thousand, one hundred twenty-one".