1210020012121 has 8 divisors (see below), whose sum is σ = 1215730661760. Its totient is φ = 1204314761328.

The previous prime is 1210020012109. The next prime is 1210020012167. The reversal of 1210020012121 is 1212100200121.

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 1210020012121 - 2²¹ = 1210017914969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1210020012191) 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 7 ways as a sum of consecutive naturals, for example, 900051 + ... + 1797256.

It is an arithmetic number, because the mean of its divisors is an integer number (151966332720).

Almost surely, 2^{1210020012121} is an apocalyptic number.

It is an amenable number.

1210020012121 is a deficient number, since it is larger than the sum of its proper divisors (5710649639).

1210020012121 is a wasteful number, since it uses less digits than its factorization.

1210020012121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2699423.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1210020012121 its reverse (1212100200121), we get a palindrome (2422120212242).

The spelling of 1210020012121 in words is "one trillion, two hundred ten billion, twenty million, twelve thousand, one hundred twenty-one".