1212120120101 has 16 divisors (see below), whose sum is σ = 1402424489088. Its totient is φ = 1036738507200.

The previous prime is 1212120120091. The next prime is 1212120120103. The reversal of 1212120120101 is 1010210212121.

It is not a de Polignac number, because 1212120120101 - 2³⁰ = 1211046378277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212120120103) 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, 39254966 + ... + 39285831.

It is an arithmetic number, because the mean of its divisors is an integer number (87651530568).

Almost surely, 2^{1212120120101} is an apocalyptic number.

1212120120101 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1212120120101 is a deficient number, since it is larger than the sum of its proper divisors (190304368987).

1212120120101 is a wasteful number, since it uses less digits than its factorization.

1212120120101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78540892.

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

Adding to 1212120120101 its reverse (1010210212121), we get a palindrome (2222330332222).

The spelling of 1212120120101 in words is "one trillion, two hundred twelve billion, one hundred twenty million, one hundred twenty thousand, one hundred one".