212025221533 has 4 divisors (see below), whose sum is σ = 212057942908. Its totient is φ = 211992500160.

The previous prime is 212025221531. The next prime is 212025221537. The reversal of 212025221533 is 335122520212.

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 133065907524 + 78959314009 = 364782^2 + 280997^2 .

It is a cyclic number.

It is not a de Polignac number, because 212025221533 - 2¹ = 212025221531 is a prime.

It is a super-2 number, since 2×212025221533² (a number of 23 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 (212025221531) 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, 16350966 + ... + 16363927.

It is an arithmetic number, because the mean of its divisors is an integer number (53014485727).

Almost surely, 2^212025221533 is an apocalyptic number.

It is an amenable number.

212025221533 is a deficient number, since it is larger than the sum of its proper divisors (32721375).

212025221533 is an equidigital number, since it uses as much as digits as its factorization.

212025221533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32721374.

The product of its (nonzero) digits is 7200, while the sum is 28.

Adding to 212025221533 its reverse (335122520212), we get a palindrome (547147741745).

The spelling of 212025221533 in words is "two hundred twelve billion, twenty-five million, two hundred twenty-one thousand, five hundred thirty-three".