1202120212021 has 4 divisors (see below), whose sum is σ = 1202172630912. Its totient is φ = 1202067793132.

The previous prime is 1202120212003. The next prime is 1202120212061.

It is a happy number.

1202120212021 is nontrivially palindromic in base 10.

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 1202120212021 - 2⁷ = 1202120211893 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1202120211986 and 1202120212004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1202120212061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26175031 + ... + 26220916.

It is an arithmetic number, because the mean of its divisors is an integer number (300543157728).

Almost surely, 2^{1202120212021} is an apocalyptic number.

It is an amenable number.

1202120212021 is a deficient number, since it is larger than the sum of its proper divisors (52418891).

1202120212021 is an equidigital number, since it uses as much as digits as its factorization.

1202120212021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52418890.

The product of its (nonzero) digits is 64, while the sum is 16.

It can be divided in two parts, 1202120 and 212021, that added together give a palindrome (1414141).

The spelling of 1202120212021 in words is "one trillion, two hundred two billion, one hundred twenty million, two hundred twelve thousand, twenty-one".