212122351530 has 64 divisors (see below), whose sum is σ = 568819843200. Its totient is φ = 56249936640.

The previous prime is 212122351517. The next prime is 212122351543. The reversal of 212122351530 is 35153221212.

212122351530 is a `hidden beast` number, since 2 + 1 + 2 + 122 + 3 + 5 + 1 + 530 = 666.

It is an interprime number because it is at equal distance from previous prime (212122351517) and next prime (212122351543).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 212122351494 and 212122351503.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2146191 + ... + 2242850.

It is an arithmetic number, because the mean of its divisors is an integer number (8887810050).

Almost surely, 2^212122351530 is an apocalyptic number.

212122351530 is an abundant number, since it is smaller than the sum of its proper divisors (356697491670).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

212122351530 is a wasteful number, since it uses less digits than its factorization.

212122351530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4389236 (or 4389230 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

Adding to 212122351530 its reverse (35153221212), we get a palindrome (247275572742).

The spelling of 212122351530 in words is "two hundred twelve billion, one hundred twenty-two million, three hundred fifty-one thousand, five hundred thirty".