202021221211 has 16 divisors (see below), whose sum is σ = 215457096960. Its totient is φ = 189019151200.

The previous prime is 202021221167. The next prime is 202021221253. The reversal of 202021221211 is 112122120202.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 202021221211 - 2⁹ = 202021220699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (202021224211) 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, 331081 + ... + 716698.

It is an arithmetic number, because the mean of its divisors is an integer number (13466068560).

Almost surely, 2^202021221211 is an apocalyptic number.

202021221211 is a deficient number, since it is larger than the sum of its proper divisors (13435875749).

202021221211 is a wasteful number, since it uses less digits than its factorization.

202021221211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1047986.

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

Adding to 202021221211 its reverse (112122120202), we get a palindrome (314143341413).

The spelling of 202021221211 in words is "two hundred two billion, twenty-one million, two hundred twenty-one thousand, two hundred eleven".