1021221220002 has 8 divisors (see below), whose sum is σ = 2042442440016. Its totient is φ = 340407073332.

The previous prime is 1021221220001. The next prime is 1021221220037. The reversal of 1021221220002 is 2000221221201.

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

1021221220002 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (1021221220001) 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, 85101768328 + ... + 85101768339.

It is an arithmetic number, because the mean of its divisors is an integer number (255305305002).

Almost surely, 2^{1021221220002} is an apocalyptic number.

1021221220002 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1021221220002 is a wasteful number, since it uses less digits than its factorization.

1021221220002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170203536672.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 1021221220002 its reverse (2000221221201), we get a palindrome (3021442441203).

The spelling of 1021221220002 in words is "one trillion, twenty-one billion, two hundred twenty-one million, two hundred twenty thousand, two".