1210802212021 has 4 divisors (see below), whose sum is σ = 1210817588544. Its totient is φ = 1210786835500.

The previous prime is 1210802212019. The next prime is 1210802212031. The reversal of 1210802212021 is 1202122080121.

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 1210802212021 - 2¹ = 1210802212019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1210802211983 and 1210802212001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1210802212031) 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 3 ways as a sum of consecutive naturals, for example, 7569535 + ... + 7727836.

It is an arithmetic number, because the mean of its divisors is an integer number (302704397136).

Almost surely, 2^{1210802212021} is an apocalyptic number.

It is an amenable number.

1210802212021 is a deficient number, since it is larger than the sum of its proper divisors (15376523).

1210802212021 is an equidigital number, since it uses as much as digits as its factorization.

1210802212021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15376522.

The product of its (nonzero) digits is 256, while the sum is 22.

Adding to 1210802212021 its reverse (1202122080121), we get a palindrome (2412924292142).

The spelling of 1210802212021 in words is "one trillion, two hundred ten billion, eight hundred two million, two hundred twelve thousand, twenty-one".