1221101312002 has 32 divisors (see below), whose sum is σ = 2153740990464. Its totient is φ = 511904928000.

The previous prime is 1221101311967. The next prime is 1221101312089. The reversal of 1221101312002 is 2002131011221.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1525543 + ... + 2183914.

It is an arithmetic number, because the mean of its divisors is an integer number (67304405952).

Almost surely, 2^{1221101312002} is an apocalyptic number.

1221101312002 is a deficient number, since it is larger than the sum of its proper divisors (932639678462).

1221101312002 is a wasteful number, since it uses less digits than its factorization.

1221101312002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3710634.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 1221101312002 its reverse (2002131011221), we get a palindrome (3223232323223).

The spelling of 1221101312002 in words is "one trillion, two hundred twenty-one billion, one hundred one million, three hundred twelve thousand, two".