1211212321102 has 24 divisors (see below), whose sum is σ = 2113605369720. Its totient is φ = 519050846160.

The previous prime is 1211212321097. The next prime is 1211212321117. The reversal of 1211212321102 is 2011232121121.

It is a self number, because there is not a number n which added to its sum of digits gives 1211212321102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 813277 + ... + 1756087.

It is an arithmetic number, because the mean of its divisors is an integer number (88066890405).

Almost surely, 2^{1211212321102} is an apocalyptic number.

1211212321102 is a deficient number, since it is larger than the sum of its proper divisors (902393048618).

1211212321102 is a wasteful number, since it uses less digits than its factorization.

1211212321102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 955936 (or 955929 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 1211212321102 its reverse (2011232121121), we get a palindrome (3222444442223).

The spelling of 1211212321102 in words is "one trillion, two hundred eleven billion, two hundred twelve million, three hundred twenty-one thousand, one hundred two".