202021002021 has 16 divisors (see below), whose sum is σ = 290764863360. Its totient is φ = 124382744640.

The previous prime is 202021001993. The next prime is 202021002031. The reversal of 202021002021 is 120200120202.

It is not a de Polignac number, because 202021002021 - 2⁵ = 202021001989 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 202021001988 and 202021002006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202021002031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50478010 + ... + 50482011.

It is an arithmetic number, because the mean of its divisors is an integer number (18172803960).

Almost surely, 2^202021002021 is an apocalyptic number.

It is an amenable number.

202021002021 is a deficient number, since it is larger than the sum of its proper divisors (88743861339).

202021002021 is a wasteful number, since it uses less digits than its factorization.

202021002021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100960076.

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 202021002021 its reverse (120200120202), we get a palindrome (322221122223).

The spelling of 202021002021 in words is "two hundred two billion, twenty-one million, two thousand, twenty-one".