1210001100121 has 8 divisors (see below), whose sum is σ = 1320009165504. Its totient is φ = 1099994362320.

The previous prime is 1210001100067. The next prime is 1210001100193. The reversal of 1210001100121 is 1210011000121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1210001100121 - 2²⁹ = 1209464229209 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1210001100098 and 1210001100107.

It is not an unprimeable number, because it can be changed into a prime (1210001100521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3343591 + ... + 3687763.

It is an arithmetic number, because the mean of its divisors is an integer number (165001145688).

Almost surely, 2^{1210001100121} is an apocalyptic number.

1210001100121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1210001100121 is a deficient number, since it is larger than the sum of its proper divisors (110008065383).

1210001100121 is a wasteful number, since it uses less digits than its factorization.

1210001100121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 663791.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 1210001100121 its reverse (1210011000121), we get a palindrome (2420012100242).

The spelling of 1210001100121 in words is "one trillion, two hundred ten billion, one million, one hundred thousand, one hundred twenty-one".