1321212121222 has 24 divisors (see below), whose sum is σ = 2343173464800. Its totient is φ = 556951242960.

The previous prime is 1321212121199. The next prime is 1321212121267. The reversal of 1321212121222 is 2221212121231.

It is a super-3 number, since 3×1321212121222³ (a number of 37 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1321212121193 and 1321212121202.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 110500222 + ... + 110512177.

It is an arithmetic number, because the mean of its divisors is an integer number (97632227700).

Almost surely, 2^{1321212121222} is an apocalyptic number.

1321212121222 is a deficient number, since it is larger than the sum of its proper divisors (1021961343578).

1321212121222 is a wasteful number, since it uses less digits than its factorization.

1321212121222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221012476 (or 221012469 counting only the distinct ones).

The product of its digits is 384, while the sum is 22.

Adding to 1321212121222 its reverse (2221212121231), we get a palindrome (3542424242453).

Subtracting 1321212121222 from its reverse (2221212121231), we obtain a palindrome (900000000009).

The spelling of 1321212121222 in words is "one trillion, three hundred twenty-one billion, two hundred twelve million, one hundred twenty-one thousand, two hundred twenty-two".