22110210221021 has 4 divisors (see below), whose sum is σ = 23810995622652. Its totient is φ = 20409424819392.

The previous prime is 22110210220951. The next prime is 22110210221027. The reversal of 22110210221021 is 12012201201122.

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 8860064215396 + 13250146005625 = 2976586^2 + 3640075^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22110210221021 is a prime.

It is a super-2 number, since 2×22110210221021² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22110210221027) 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, 850392700796 + ... + 850392700821.

It is an arithmetic number, because the mean of its divisors is an integer number (5952748905663).

Almost surely, 2^{22110210221021} is an apocalyptic number.

It is an amenable number.

22110210221021 is a deficient number, since it is larger than the sum of its proper divisors (1700785401631).

22110210221021 is a wasteful number, since it uses less digits than its factorization.

22110210221021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1700785401630.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 22110210221021 its reverse (12012201201122), we get a palindrome (34122411422143).

The spelling of 22110210221021 in words is "twenty-two trillion, one hundred ten billion, two hundred ten million, two hundred twenty-one thousand, twenty-one".