22111101202021 has 8 divisors (see below), whose sum is σ = 23818097045624. Its totient is φ = 20404982773440.

The previous prime is 22111101202019. The next prime is 22111101202033. The reversal of 22111101202021 is 12020210111122.

It can be written as a sum of positive squares in 4 ways, for example, as 2429589333796 + 19681511868225 = 1558714^2 + 4436385^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22111101202021 - 2¹ = 22111101202019 is a prime.

It is a super-2 number, since 2×22111101202021² (a number of 27 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 = 22111101201986 and 22111101202004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22111101205021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 219301410 + ... + 219402211.

It is an arithmetic number, because the mean of its divisors is an integer number (2977262130703).

Almost surely, 2^{22111101202021} is an apocalyptic number.

It is an amenable number.

22111101202021 is a deficient number, since it is larger than the sum of its proper divisors (1706995843603).

22111101202021 is a wasteful number, since it uses less digits than its factorization.

22111101202021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 438707511.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 22111101202021 its reverse (12020210111122), we get a palindrome (34131311313143).

The spelling of 22111101202021 in words is "twenty-two trillion, one hundred eleven billion, one hundred one million, two hundred two thousand, twenty-one".