20121045012347 has 2 divisors, whose sum is σ = 20121045012348. Its totient is φ = 20121045012346.

The previous prime is 20121045012331. The next prime is 20121045012359. The reversal of 20121045012347 is 74321054012102.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20121045012347 - 2⁴ = 20121045012331 is a prime.

It is not a weakly prime, because it can be changed into another prime (20121045012317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10060522506173 + 10060522506174.

It is an arithmetic number, because the mean of its divisors is an integer number (10060522506174).

Almost surely, 2^{20121045012347} is an apocalyptic number.

20121045012347 is a deficient number, since it is larger than the sum of its proper divisors (1).

20121045012347 is an equidigital number, since it uses as much as digits as its factorization.

20121045012347 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13440, while the sum is 32.

Adding to 20121045012347 its reverse (74321054012102), we get a palindrome (94442099024449).

The spelling of 20121045012347 in words is "twenty trillion, one hundred twenty-one billion, forty-five million, twelve thousand, three hundred forty-seven".