22120110001021 has 8 divisors (see below), whose sum is σ = 22537547823960. Its totient is φ = 21702675039552.

The previous prime is 22120110001019. The next prime is 22120110001051. The reversal of 22120110001021 is 12010001102122.

It can be written as a sum of positive squares in 4 ways, for example, as 3301961436900 + 18818148564121 = 1817130^2 + 4337989^2 .

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 22120110001021 - 2¹ = 22120110001019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22120110000992 and 22120110001010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22120110001051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21121915 + ... + 22144423.

It is an arithmetic number, because the mean of its divisors is an integer number (2817193477995).

Almost surely, 2^{22120110001021} is an apocalyptic number.

It is an amenable number.

22120110001021 is a deficient number, since it is larger than the sum of its proper divisors (417437822939).

22120110001021 is a wasteful number, since it uses less digits than its factorization.

22120110001021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1430735.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 22120110001021 its reverse (12010001102122), we get a palindrome (34130111103143).

The spelling of 22120110001021 in words is "twenty-two trillion, one hundred twenty billion, one hundred ten million, one thousand, twenty-one".