11212123630 has 64 divisors (see below), whose sum is σ = 21930289920. Its totient is φ = 4113158400.

The previous prime is 11212123621. The next prime is 11212123667. The reversal of 11212123630 is 3632121211.

It is a happy number.

It is a congruent number.

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, 1014997 + ... + 1025983.

It is an arithmetic number, because the mean of its divisors is an integer number (342660780).

Almost surely, 2^11212123630 is an apocalyptic number.

11212123630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11212123630 is a deficient number, since it is larger than the sum of its proper divisors (10718166290).

11212123630 is a wasteful number, since it uses less digits than its factorization.

11212123630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11185.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 11212123630 its reverse (3632121211), we get a palindrome (14844244841).

The spelling of 11212123630 in words is "eleven billion, two hundred twelve million, one hundred twenty-three thousand, six hundred thirty".