1211221202122 has 8 divisors (see below), whose sum is σ = 1829902536000. Its totient is φ = 601253690124.

The previous prime is 1211221202101. The next prime is 1211221202143. The reversal of 1211221202122 is 2212021221121.

It is an interprime number because it is at equal distance from previous prime (1211221202101) and next prime (1211221202143).

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

It is a self number, because there is not a number n which added to its sum of digits gives 1211221202122.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2178455122 + ... + 2178455677.

It is an arithmetic number, because the mean of its divisors is an integer number (228737817000).

Almost surely, 2^{1211221202122} is an apocalyptic number.

1211221202122 is a deficient number, since it is larger than the sum of its proper divisors (618681333878).

1211221202122 is a wasteful number, since it uses less digits than its factorization.

1211221202122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4356910940.

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

Adding to 1211221202122 its reverse (2212021221121), we get a palindrome (3423242423243).

The spelling of 1211221202122 in words is "one trillion, two hundred eleven billion, two hundred twenty-one million, two hundred two thousand, one hundred twenty-two".