202211122021 has 4 divisors (see below), whose sum is σ = 202240739500. Its totient is φ = 202181504544.

The previous prime is 202211122007. The next prime is 202211122063. The reversal of 202211122021 is 120221112202.

It is a happy number.

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 71283660100 + 130927461921 = 266990^2 + 361839^2 .

It is a cyclic number.

It is not a de Polignac number, because 202211122021 - 2⁹ = 202211121509 is a prime.

It is a super-2 number, since 2×202211122021² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202211121986 and 202211122004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202211125021) 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, 14798496 + ... + 14812153.

It is an arithmetic number, because the mean of its divisors is an integer number (50560184875).

Almost surely, 2^202211122021 is an apocalyptic number.

It is an amenable number.

202211122021 is a deficient number, since it is larger than the sum of its proper divisors (29617479).

202211122021 is an equidigital number, since it uses as much as digits as its factorization.

202211122021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29617478.

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

Adding to 202211122021 its reverse (120221112202), we get a palindrome (322432234223).

The spelling of 202211122021 in words is "two hundred two billion, two hundred eleven million, one hundred twenty-two thousand, twenty-one".