2122312121225 has 6 divisors (see below), whose sum is σ = 2631667030350. Its totient is φ = 1697849696960.

The previous prime is 2122312121203. The next prime is 2122312121287. The reversal of 2122312121225 is 5221212132212.

It can be written as a sum of positive squares in 3 ways, for example, as 1316020729 + 2120996100496 = 36277^2 + 1456364^2 .

It is not a de Polignac number, because 2122312121225 - 2¹² = 2122312117129 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2122312121194 and 2122312121203.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 42446242400 + ... + 42446242449.

It is an arithmetic number, because the mean of its divisors is an integer number (438611171725).

Almost surely, 2^{2122312121225} is an apocalyptic number.

2122312121225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2122312121225 is a deficient number, since it is larger than the sum of its proper divisors (509354909125).

2122312121225 is an equidigital number, since it uses as much as digits as its factorization.

2122312121225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84892484859 (or 84892484854 counting only the distinct ones).

The product of its digits is 1920, while the sum is 26.

Adding to 2122312121225 its reverse (5221212132212), we get a palindrome (7343524253437).

The spelling of 2122312121225 in words is "two trillion, one hundred twenty-two billion, three hundred twelve million, one hundred twenty-one thousand, two hundred twenty-five".