202021211011 has 4 divisors (see below), whose sum is σ = 202057414624. Its totient is φ = 201985007400.

The previous prime is 202021210987. The next prime is 202021211069. The reversal of 202021211011 is 110112120202.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 202021211011 - 2¹³ = 202021202819 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202021210982 and 202021211000.

It is not an unprimeable number, because it can be changed into a prime (202021241011) 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, 18093435 + ... + 18104596.

It is an arithmetic number, because the mean of its divisors is an integer number (50514353656).

Almost surely, 2^202021211011 is an apocalyptic number.

202021211011 is a deficient number, since it is larger than the sum of its proper divisors (36203613).

202021211011 is an equidigital number, since it uses as much as digits as its factorization.

202021211011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36203612.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 202021211011 its reverse (110112120202), we get a palindrome (312133331213).

The spelling of 202021211011 in words is "two hundred two billion, twenty-one million, two hundred eleven thousand, eleven".