1211212223102 has 12 divisors (see below), whose sum is σ = 2113441736400. Its totient is φ = 519090952716.

The previous prime is 1211212223051. The next prime is 1211212223107. The reversal of 1211212223102 is 2013222121121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211212223107) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6179654102 + ... + 6179654297.

It is an arithmetic number, because the mean of its divisors is an integer number (176120144700).

Almost surely, 2^{1211212223102} is an apocalyptic number.

1211212223102 is a deficient number, since it is larger than the sum of its proper divisors (902229513298).

1211212223102 is a wasteful number, since it uses less digits than its factorization.

1211212223102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12359308415 (or 12359308408 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 1211212223102 its reverse (2013222121121), we get a palindrome (3224434344223).

The spelling of 1211212223102 in words is "one trillion, two hundred eleven billion, two hundred twelve million, two hundred twenty-three thousand, one hundred two".