1212010220123 has 4 divisors (see below), whose sum is σ = 1212012450408. Its totient is φ = 1212007989840.

The previous prime is 1212010220087. The next prime is 1212010220147. The reversal of 1212010220123 is 3210220102121.

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 1212010220123 - 2²⁶ = 1211943111259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1212010220623) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 291215 + ... + 1583927.

It is an arithmetic number, because the mean of its divisors is an integer number (303003112602).

Almost surely, 2^{1212010220123} is an apocalyptic number.

1212010220123 is a deficient number, since it is larger than the sum of its proper divisors (2230285).

1212010220123 is an equidigital number, since it uses as much as digits as its factorization.

1212010220123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2230284.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 1212010220123 its reverse (3210220102121), we get a palindrome (4422230322244).

The spelling of 1212010220123 in words is "one trillion, two hundred twelve billion, ten million, two hundred twenty thousand, one hundred twenty-three".