1210120012021 has 8 divisors (see below), whose sum is σ = 1234050435360. Its totient is φ = 1186230254352.

The previous prime is 1210120011967. The next prime is 1210120012081. The reversal of 1210120012021 is 1202100210121.

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 1210120012021 - 2³⁹ = 660364198133 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1210120011992 and 1210120012010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1210120012081) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10106311 + ... + 10225348.

It is an arithmetic number, because the mean of its divisors is an integer number (154256304420).

Almost surely, 2^{1210120012021} is an apocalyptic number.

It is an amenable number.

1210120012021 is a deficient number, since it is larger than the sum of its proper divisors (23930423339).

1210120012021 is a wasteful number, since it uses less digits than its factorization.

1210120012021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20332835.

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

Adding to 1210120012021 its reverse (1202100210121), we get a palindrome (2412220222142).

The spelling of 1210120012021 in words is "one trillion, two hundred ten billion, one hundred twenty million, twelve thousand, twenty-one".