1222121211002 has 4 divisors (see below), whose sum is σ = 1833181816506. Its totient is φ = 611060605500.

The previous prime is 1222121210957. The next prime is 1222121211007. The reversal of 1222121211002 is 2001121212221.

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., 984855775201 + 237265435801 = 992399^2 + 487099^2 .

It is not an unprimeable number, because it can be changed into a prime (1222121211007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 305530302749 + ... + 305530302752.

Almost surely, 2^{1222121211002} is an apocalyptic number.

1222121211002 is a deficient number, since it is larger than the sum of its proper divisors (611060605504).

1222121211002 is an equidigital number, since it uses as much as digits as its factorization.

1222121211002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 611060605503.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 1222121211002 its reverse (2001121212221), we get a palindrome (3223242423223).

The spelling of 1222121211002 in words is "one trillion, two hundred twenty-two billion, one hundred twenty-one million, two hundred eleven thousand, two".