1212212222101 has 4 divisors (see below), whose sum is σ = 1218984357600. Its totient is φ = 1205440086604.

The previous prime is 1212212222071. The next prime is 1212212222131. The reversal of 1212212222101 is 1012222122121.

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 an interprime number because it is at equal distance from previous prime (1212212222071) and next prime (1212212222131).

It is a cyclic number.

It is not a de Polignac number, because 1212212222101 - 2⁵ = 1212212222069 is a prime.

It is a super-2 number, since 2×1212212222101² (a number of 25 digits) contains 22 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 (1212212222131) 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, 3386067481 + ... + 3386067838.

It is an arithmetic number, because the mean of its divisors is an integer number (304746089400).

Almost surely, 2^{1212212222101} is an apocalyptic number.

It is an amenable number.

1212212222101 is a deficient number, since it is larger than the sum of its proper divisors (6772135499).

1212212222101 is an equidigital number, since it uses as much as digits as its factorization.

1212212222101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6772135498.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 1212212222101 its reverse (1012222122121), we get a palindrome (2224434344222).

The spelling of 1212212222101 in words is "one trillion, two hundred twelve billion, two hundred twelve million, two hundred twenty-two thousand, one hundred one".