1212212021011 has 4 divisors (see below), whose sum is σ = 1251315634624. Its totient is φ = 1173108407400.

The previous prime is 1212212021003. The next prime is 1212212021071. The reversal of 1212212021011 is 1101202122121.

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 1212212021011 - 2³ = 1212212021003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1212212021071) 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, 19551806760 + ... + 19551806821.

It is an arithmetic number, because the mean of its divisors is an integer number (312828908656).

Almost surely, 2^{1212212021011} is an apocalyptic number.

1212212021011 is a deficient number, since it is larger than the sum of its proper divisors (39103613613).

1212212021011 is an equidigital number, since it uses as much as digits as its factorization.

1212212021011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39103613612.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 1212212021011 its reverse (1101202122121), we get a palindrome (2313414143132).

The spelling of 1212212021011 in words is "one trillion, two hundred twelve billion, two hundred twelve million, twenty-one thousand, eleven".