20121001011043 has 2 divisors, whose sum is σ = 20121001011044. Its totient is φ = 20121001011042.

The previous prime is 20121001010989. The next prime is 20121001011079. The reversal of 20121001011043 is 34011010012102.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20121001011043 is a prime.

It is not a weakly prime, because it can be changed into another prime (20121001011743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10060500505521 + 10060500505522.

It is an arithmetic number, because the mean of its divisors is an integer number (10060500505522).

Almost surely, 2^{20121001011043} is an apocalyptic number.

20121001011043 is a deficient number, since it is larger than the sum of its proper divisors (1).

20121001011043 is an equidigital number, since it uses as much as digits as its factorization.

20121001011043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 20121001011043 its reverse (34011010012102), we get a palindrome (54132011023145).

The spelling of 20121001011043 in words is "twenty trillion, one hundred twenty-one billion, one million, eleven thousand, forty-three".