212021121307 has 4 divisors (see below), whose sum is σ = 215496877456. Its totient is φ = 208545365160.

The previous prime is 212021121281. The next prime is 212021121311. The reversal of 212021121307 is 703121120212.

212021121307 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 212021121307 - 2²³ = 212012732699 is a prime.

It is not an unprimeable number, because it can be changed into a prime (212021121397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1737877983 + ... + 1737878104.

It is an arithmetic number, because the mean of its divisors is an integer number (53874219364).

Almost surely, 2^212021121307 is an apocalyptic number.

212021121307 is a deficient number, since it is larger than the sum of its proper divisors (3475756149).

212021121307 is an equidigital number, since it uses as much as digits as its factorization.

212021121307 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3475756148.

The product of its (nonzero) digits is 336, while the sum is 22.

Adding to 212021121307 its reverse (703121120212), we get a palindrome (915142241519).

The spelling of 212021121307 in words is "two hundred twelve billion, twenty-one million, one hundred twenty-one thousand, three hundred seven".