22120221201021 has 18 divisors (see below), whose sum is σ = 33941485130202. Its totient is φ = 13879354477440.

The previous prime is 22120221201007. The next prime is 22120221201031. The reversal of 22120221201021 is 12010212202122.

It is a happy number.

22120221201021 is a `hidden beast` number, since 221 + 2 + 0 + 221 + 201 + 0 + 21 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 14396902205625 + 7723318995396 = 3794325^2 + 2779086^2 .

It is not a de Polignac number, because 22120221201021 - 2⁵ = 22120221200989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22120221200985 and 22120221201003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22120221201031) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 4252250610 + ... + 4252255811.

It is an arithmetic number, because the mean of its divisors is an integer number (1885638062789).

Almost surely, 2^{22120221201021} is an apocalyptic number.

It is an amenable number.

22120221201021 is a deficient number, since it is larger than the sum of its proper divisors (11821263929181).

22120221201021 is a wasteful number, since it uses less digits than its factorization.

22120221201021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8504506461 (or 8504506441 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 22120221201021 its reverse (12010212202122), we get a palindrome (34130433403143).

The spelling of 22120221201021 in words is "twenty-two trillion, one hundred twenty billion, two hundred twenty-one million, two hundred one thousand, twenty-one".