1221212210132 has 24 divisors (see below), whose sum is σ = 2141123048064. Its totient is φ = 609463775552.

The previous prime is 1221212210077. The next prime is 1221212210149. The reversal of 1221212210132 is 2310122121221.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4766933 + ... + 5016579.

It is an arithmetic number, because the mean of its divisors is an integer number (89213460336).

Almost surely, 2^{1221212210132} is an apocalyptic number.

It is an amenable number.

1221212210132 is a deficient number, since it is larger than the sum of its proper divisors (919910837932).

1221212210132 is a wasteful number, since it uses less digits than its factorization.

1221212210132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251935 (or 251933 counting only the distinct ones).

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

Adding to 1221212210132 its reverse (2310122121221), we get a palindrome (3531334331353).

The spelling of 1221212210132 in words is "one trillion, two hundred twenty-one billion, two hundred twelve million, two hundred ten thousand, one hundred thirty-two".