222121520245 has 4 divisors (see below), whose sum is σ = 266545824300. Its totient is φ = 177697216192.

The previous prime is 222121520239. The next prime is 222121520263. The reversal of 222121520245 is 542025121222.

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 147340054801 + 74781465444 = 383849^2 + 273462^2 .

It is a cyclic number.

It is not a de Polignac number, because 222121520245 - 2³ = 222121520237 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22212152020 + ... + 22212152029.

It is an arithmetic number, because the mean of its divisors is an integer number (66636456075).

Almost surely, 2^222121520245 is an apocalyptic number.

It is an amenable number.

222121520245 is a deficient number, since it is larger than the sum of its proper divisors (44424304055).

222121520245 is an equidigital number, since it uses as much as digits as its factorization.

222121520245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44424304054.

The product of its (nonzero) digits is 6400, while the sum is 28.

Adding to 222121520245 its reverse (542025121222), we get a palindrome (764146641467).

The spelling of 222121520245 in words is "two hundred twenty-two billion, one hundred twenty-one million, five hundred twenty thousand, two hundred forty-five".