1221212010002 has 4 divisors (see below), whose sum is σ = 1831818015006. Its totient is φ = 610606005000.

The previous prime is 1221212010001. The next prime is 1221212010059. The reversal of 1221212010002 is 2000102121221.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 849381581161 + 371830428841 = 921619^2 + 609779^2 .

It is a super-3 number, since 3×1221212010002³ (a number of 37 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (1221212010001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 305303002499 + ... + 305303002502.

Almost surely, 2^{1221212010002} is an apocalyptic number.

1221212010002 is a deficient number, since it is larger than the sum of its proper divisors (610606005004).

1221212010002 is an equidigital number, since it uses as much as digits as its factorization.

1221212010002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 610606005003.

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

Adding to 1221212010002 its reverse (2000102121221), we get a palindrome (3221314131223).

The spelling of 1221212010002 in words is "one trillion, two hundred twenty-one billion, two hundred twelve million, ten thousand, two".