1202110120021 has 4 divisors (see below), whose sum is σ = 1219041248544. Its totient is φ = 1185178991500.

The previous prime is 1202110119967. The next prime is 1202110120069. The reversal of 1202110120021 is 1200210112021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1202110120021 - 2³¹ = 1199962636373 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1202110119983 and 1202110120010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1202110121021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8465564155 + ... + 8465564296.

It is an arithmetic number, because the mean of its divisors is an integer number (304760312136).

Almost surely, 2^{1202110120021} is an apocalyptic number.

It is an amenable number.

1202110120021 is a deficient number, since it is larger than the sum of its proper divisors (16931128523).

1202110120021 is an equidigital number, since it uses as much as digits as its factorization.

1202110120021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16931128522.

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

Adding to 1202110120021 its reverse (1200210112021), we get a palindrome (2402320232042).

The spelling of 1202110120021 in words is "one trillion, two hundred two billion, one hundred ten million, one hundred twenty thousand, twenty-one".