1211020000123 has 2 divisors, whose sum is σ = 1211020000124. Its totient is φ = 1211020000122.

The previous prime is 1211020000111. The next prime is 1211020000133. The reversal of 1211020000123 is 3210000201121.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1211020000123 is a prime.

It is not a weakly prime, because it can be changed into another prime (1211020000133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605510000061 + 605510000062.

It is an arithmetic number, because the mean of its divisors is an integer number (605510000062).

Almost surely, 2^{1211020000123} is an apocalyptic number.

1211020000123 is a deficient number, since it is larger than the sum of its proper divisors (1).

1211020000123 is an equidigital number, since it uses as much as digits as its factorization.

1211020000123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 1211020000123 its reverse (3210000201121), we get a palindrome (4421020201244).

The spelling of 1211020000123 in words is "one trillion, two hundred eleven billion, twenty million, one hundred twenty-three", and thus it is an aban number.