1212020111123 has 2 divisors, whose sum is σ = 1212020111124. Its totient is φ = 1212020111122.

The previous prime is 1212020111119. The next prime is 1212020111129. The reversal of 1212020111123 is 3211110202121.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1212020111123 - 2² = 1212020111119 is a prime.

It is a super-2 number, since 2×1212020111123² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1212020111129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606010055561 + 606010055562.

It is an arithmetic number, because the mean of its divisors is an integer number (606010055562).

Almost surely, 2^{1212020111123} is an apocalyptic number.

1212020111123 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212020111123 is an equidigital number, since it uses as much as digits as its factorization.

1212020111123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 1212020111123 its reverse (3211110202121), we get a palindrome (4423130313244).

The spelling of 1212020111123 in words is "one trillion, two hundred twelve billion, twenty million, one hundred eleven thousand, one hundred twenty-three".