1202021020021 has 4 divisors (see below), whose sum is σ = 1202173588000. Its totient is φ = 1201868452044.

The previous prime is 1202021020001. The next prime is 1202021020061. The reversal of 1202021020021 is 1200201202021.

It is a happy number.

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 1202021020021 - 2⁵ = 1202021019989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1202021019983 and 1202021020010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1202021020001) 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, 76272171 + ... + 76287928.

It is an arithmetic number, because the mean of its divisors is an integer number (300543397000).

Almost surely, 2^{1202021020021} is an apocalyptic number.

It is an amenable number.

1202021020021 is a deficient number, since it is larger than the sum of its proper divisors (152567979).

1202021020021 is an equidigital number, since it uses as much as digits as its factorization.

1202021020021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152567978.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 1202021020021 its reverse (1200201202021), we get a palindrome (2402222222042).

The spelling of 1202021020021 in words is "one trillion, two hundred two billion, twenty-one million, twenty thousand, twenty-one".