1221000110002 has 8 divisors (see below), whose sum is σ = 1831572441216. Its totient is φ = 610475962932.

The previous prime is 1221000109981. The next prime is 1221000110009. The reversal of 1221000110002 is 2000110001221.

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

It is a super-2 number, since 2×1221000110002² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1221000110009) 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, 11982618 + ... + 12084085.

It is an arithmetic number, because the mean of its divisors is an integer number (228946555152).

Almost surely, 2^{1221000110002} is an apocalyptic number.

1221000110002 is a deficient number, since it is larger than the sum of its proper divisors (610572331214).

1221000110002 is a wasteful number, since it uses less digits than its factorization.

1221000110002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24092072.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 1221000110002 its reverse (2000110001221), we get a palindrome (3221110111223).

The spelling of 1221000110002 in words is "one trillion, two hundred twenty-one billion, one hundred ten thousand, two".