1220222121002 has 4 divisors (see below), whose sum is σ = 1830333181506. Its totient is φ = 610111060500.

The previous prime is 1220222120987. The next prime is 1220222121023. The reversal of 1220222121002 is 2001212220221.

It is a happy number.

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., 740307088921 + 479915032081 = 860411^2 + 692759^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 305055530249 + ... + 305055530252.

Almost surely, 2^{1220222121002} is an apocalyptic number.

1220222121002 is a deficient number, since it is larger than the sum of its proper divisors (610111060504).

1220222121002 is an equidigital number, since it uses as much as digits as its factorization.

1220222121002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 610111060503.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 1220222121002 its reverse (2001212220221), we get a palindrome (3221434341223).

The spelling of 1220222121002 in words is "one trillion, two hundred twenty billion, two hundred twenty-two million, one hundred twenty-one thousand, two".