1211222131012 has 12 divisors (see below), whose sum is σ = 2119671073296. Its totient is φ = 605601824360.

The previous prime is 1211222130997. The next prime is 1211222131019. The reversal of 1211222131012 is 2101312221121.

It is not an unprimeable number, because it can be changed into a prime (1211222131019) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2011078 + ... + 2543005.

It is an arithmetic number, because the mean of its divisors is an integer number (176639256108).

Almost surely, 2^{1211222131012} is an apocalyptic number.

It is an amenable number.

1211222131012 is a deficient number, since it is larger than the sum of its proper divisors (908448942284).

1211222131012 is a wasteful number, since it uses less digits than its factorization.

1211222131012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4620578 (or 4620576 counting only the distinct ones).

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

Adding to 1211222131012 its reverse (2101312221121), we get a palindrome (3312534352133).

The spelling of 1211222131012 in words is "one trillion, two hundred eleven billion, two hundred twenty-two million, one hundred thirty-one thousand, twelve".