1212023011011 has 4 divisors (see below), whose sum is σ = 1616030681352. Its totient is φ = 808015340672.

The previous prime is 1212023010983. The next prime is 1212023011013. The reversal of 1212023011011 is 1101103202121.

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 1212023011011 - 2³¹ = 1209875527363 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1212023011013) 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, 202003835166 + ... + 202003835171.

It is an arithmetic number, because the mean of its divisors is an integer number (404007670338).

Almost surely, 2^{1212023011011} is an apocalyptic number.

1212023011011 is a deficient number, since it is larger than the sum of its proper divisors (404007670341).

1212023011011 is an equidigital number, since it uses as much as digits as its factorization.

1212023011011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404007670340.

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 1212023011011 its reverse (1101103202121), we get a palindrome (2313126213132).

The spelling of 1212023011011 in words is "one trillion, two hundred twelve billion, twenty-three million, eleven thousand, eleven".