1221101220002 has 8 divisors (see below), whose sum is σ = 1839650310300. Its totient is φ = 607884449904.

The previous prime is 1221101219999. The next prime is 1221101220011. The reversal of 1221101220002 is 2000221011221.

It can be written as a sum of positive squares in 2 ways, for example, as 983609716441 + 237491503561 = 991771^2 + 487331^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1333079477 + ... + 1333080392.

Almost surely, 2^{1221101220002} is an apocalyptic number.

1221101220002 is a deficient number, since it is larger than the sum of its proper divisors (618549090298).

1221101220002 is a wasteful number, since it uses less digits than its factorization.

1221101220002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2666160100.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 1221101220002 its reverse (2000221011221), we get a palindrome (3221322231223).

The spelling of 1221101220002 in words is "one trillion, two hundred twenty-one billion, one hundred one million, two hundred twenty thousand, two".