212051121231533 has 4 divisors (see below), whose sum is σ = 212063359439040. Its totient is φ = 212038883024028.

The previous prime is 212051121231403. The next prime is 212051121231557. The reversal of 212051121231533 is 335132121150212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212051121231533 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 212051121231533.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212051121231583) 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, 6119077763 + ... + 6119112416.

It is an arithmetic number, because the mean of its divisors is an integer number (53015839859760).

Almost surely, 2^{212051121231533} is an apocalyptic number.

It is an amenable number.

212051121231533 is a deficient number, since it is larger than the sum of its proper divisors (12238207507).

212051121231533 is a wasteful number, since it uses less digits than its factorization.

212051121231533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12238207506.

The product of its (nonzero) digits is 10800, while the sum is 32.

Adding to 212051121231533 its reverse (335132121150212), we get a palindrome (547183242381745).

The spelling of 212051121231533 in words is "two hundred twelve trillion, fifty-one billion, one hundred twenty-one million, two hundred thirty-one thousand, five hundred thirty-three".