1212001220011 has 4 divisors (see below), whose sum is σ = 1221544536832. Its totient is φ = 1202457903192.

The previous prime is 1212001220009. The next prime is 1212001220033. The reversal of 1212001220011 is 1100221002121.

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 1212001220011 - 2¹ = 1212001220009 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1212001219973 and 1212001220000.

It is not an unprimeable number, because it can be changed into a prime (1212001220411) 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, 4771658220 + ... + 4771658473.

It is an arithmetic number, because the mean of its divisors is an integer number (305386134208).

Almost surely, 2^{1212001220011} is an apocalyptic number.

1212001220011 is a deficient number, since it is larger than the sum of its proper divisors (9543316821).

1212001220011 is an equidigital number, since it uses as much as digits as its factorization.

1212001220011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9543316820.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 1212001220011 its reverse (1100221002121), we get a palindrome (2312222222132).

The spelling of 1212001220011 in words is "one trillion, two hundred twelve billion, one million, two hundred twenty thousand, eleven".