1211211210012 has 48 divisors (see below), whose sum is σ = 2992570025760. Its totient is φ = 379966769152.

The previous prime is 1211211209963. The next prime is 1211211210017. The reversal of 1211211210012 is 2100121121121.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1211211209973 and 1211211210000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211211210017) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3753064 + ... + 4062992.

It is an arithmetic number, because the mean of its divisors is an integer number (62345208870).

Almost surely, 2^{1211211210012} is an apocalyptic number.

1211211210012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1211211210012 is an abundant number, since it is smaller than the sum of its proper divisors (1781358815748).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1211211210012 is a wasteful number, since it uses less digits than its factorization.

1211211210012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329110 (or 329108 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 1211211210012 its reverse (2100121121121), we get a palindrome (3311332331133).

The spelling of 1211211210012 in words is "one trillion, two hundred eleven billion, two hundred eleven million, two hundred ten thousand, twelve".