1212220220213 has 4 divisors (see below), whose sum is σ = 1238012139840. Its totient is φ = 1186428300588.

The previous prime is 1212220220147. The next prime is 1212220220251. The reversal of 1212220220213 is 3120220222121.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1212220220213 is a prime.

It is a super-3 number, since 3×1212220220213³ (a number of 37 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1212220220293) 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, 12895959743 + ... + 12895959836.

It is an arithmetic number, because the mean of its divisors is an integer number (309503034960).

Almost surely, 2^{1212220220213} is an apocalyptic number.

It is an amenable number.

1212220220213 is a deficient number, since it is larger than the sum of its proper divisors (25791919627).

1212220220213 is an equidigital number, since it uses as much as digits as its factorization.

1212220220213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25791919626.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 1212220220213 its reverse (3120220222121), we get a palindrome (4332440442334).

The spelling of 1212220220213 in words is "one trillion, two hundred twelve billion, two hundred twenty million, two hundred twenty thousand, two hundred thirteen".