1212444442121 has 12 divisors (see below), whose sum is σ = 1332872740416. Its totient is φ = 1102068489720.

The previous prime is 1212444442091. The next prime is 1212444442127.

It is a happy number.

1212444442121 is nontrivially palindromic in base 10.

It is a de Polignac number, because none of the positive numbers 2^k-1212444442121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1212444442127) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 176876 + ... + 1567218.

It is an arithmetic number, because the mean of its divisors is an integer number (111072728368).

Almost surely, 2^{1212444442121} is an apocalyptic number.

1212444442121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1212444442121 is a deficient number, since it is larger than the sum of its proper divisors (120428298295).

1212444442121 is a wasteful number, since it uses less digits than its factorization.

1212444442121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1397572 (or 1397561 counting only the distinct ones).

The product of its digits is 16384, while the sum is 32.

The spelling of 1212444442121 in words is "one trillion, two hundred twelve billion, four hundred forty-four million, four hundred forty-two thousand, one hundred twenty-one".