1222212212121 has 8 divisors (see below), whose sum is σ = 1682184550144. Its totient is φ = 788524007760.

The previous prime is 1222212212083. The next prime is 1222212212159. The reversal of 1222212212121 is 1212122122221.

It is an interprime number because it is at equal distance from previous prime (1222212212083) and next prime (1222212212159).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1222212212121 - 2¹³ = 1222212203929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1222212212171) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6571033306 + ... + 6571033491.

It is an arithmetic number, because the mean of its divisors is an integer number (210273068768).

Almost surely, 2^{1222212212121} is an apocalyptic number.

It is an amenable number.

1222212212121 is a deficient number, since it is larger than the sum of its proper divisors (459972338023).

1222212212121 is a wasteful number, since it uses less digits than its factorization.

1222212212121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13142066831.

The product of its digits is 256, while the sum is 21.

Adding to 1222212212121 its reverse (1212122122221), we get a palindrome (2434334334342).

The spelling of 1222212212121 in words is "one trillion, two hundred twenty-two billion, two hundred twelve million, two hundred twelve thousand, one hundred twenty-one".