1221000012002 has 8 divisors (see below), whose sum is σ = 1835455742976. Its totient is φ = 609181431012.

The previous prime is 1221000011993. The next prime is 1221000012073. The reversal of 1221000012002 is 2002100001221.

It is a happy number.

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, 659286338 + ... + 659288189.

It is an arithmetic number, because the mean of its divisors is an integer number (229431967872).

Almost surely, 2^{1221000012002} is an apocalyptic number.

1221000012002 is a deficient number, since it is larger than the sum of its proper divisors (614455730974).

1221000012002 is a wasteful number, since it uses less digits than its factorization.

1221000012002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1318574992.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 1221000012002 its reverse (2002100001221), we get a palindrome (3223100013223).

The spelling of 1221000012002 in words is "one trillion, two hundred twenty-one billion, twelve thousand, two".