202111211201 has 4 divisors (see below), whose sum is σ = 204112312404. Its totient is φ = 200110110000.

The previous prime is 202111211143. The next prime is 202111211233. The reversal of 202111211201 is 102112111202.

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

It can be written as a sum of positive squares in 2 ways, for example, as 86524810801 + 115586400400 = 294151^2 + 339980^2 .

It is a cyclic number.

It is not a de Polignac number, because 202111211201 - 2¹⁸ = 202110949057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (202111211501) 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, 1000550450 + ... + 1000550651.

It is an arithmetic number, because the mean of its divisors is an integer number (51028078101).

Almost surely, 2^202111211201 is an apocalyptic number.

It is an amenable number.

202111211201 is a deficient number, since it is larger than the sum of its proper divisors (2001101203).

202111211201 is a wasteful number, since it uses less digits than its factorization.

202111211201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2001101202.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 202111211201 its reverse (102112111202), we get a palindrome (304223322403).

Subtracting from 202111211201 its reverse (102112111202), we obtain a palindrome (99999099999).

The spelling of 202111211201 in words is "two hundred two billion, one hundred eleven million, two hundred eleven thousand, two hundred one".