210202022021 has 4 divisors (see below), whose sum is σ = 211594088544. Its totient is φ = 208809955500.

The previous prime is 210202021993. The next prime is 210202022087. The reversal of 210202022021 is 120220202012.

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 a de Polignac number, because none of the positive numbers 2^k-210202022021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 210202021987 and 210202022005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210202025021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 696033035 + ... + 696033336.

It is an arithmetic number, because the mean of its divisors is an integer number (52898522136).

Almost surely, 2^210202022021 is an apocalyptic number.

It is an amenable number.

210202022021 is a deficient number, since it is larger than the sum of its proper divisors (1392066523).

210202022021 is a wasteful number, since it uses less digits than its factorization.

210202022021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1392066522.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 210202022021 its reverse (120220202012), we get a palindrome (330422224033).

The spelling of 210202022021 in words is "two hundred ten billion, two hundred two million, twenty-two thousand, twenty-one".