3121100100121 has 16 divisors (see below), whose sum is σ = 3227067993600. Its totient is φ = 3015464981760.

The previous prime is 3121100100101. The next prime is 3121100100187. The reversal of 3121100100121 is 1210010011213.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 3121100100121 - 2¹⁹ = 3121099575833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3121100100101) 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, 91988466 + ... + 92022388.

It is an arithmetic number, because the mean of its divisors is an integer number (201691749600).

Almost surely, 2^{3121100100121} is an apocalyptic number.

3121100100121 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

3121100100121 is a deficient number, since it is larger than the sum of its proper divisors (105967893479).

3121100100121 is a wasteful number, since it uses less digits than its factorization.

3121100100121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38736.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 3121100100121 its reverse (1210010011213), we get a palindrome (4331110111334).

The spelling of 3121100100121 in words is "three trillion, one hundred twenty-one billion, one hundred million, one hundred thousand, one hundred twenty-one".