1200121020002 has 16 divisors (see below), whose sum is σ = 1829926450872. Its totient is φ = 590148049920.

The previous prime is 1200121020001. The next prime is 1200121020073. The reversal of 1200121020002 is 2000201210021.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 536660270041 + 663460749961 = 732571^2 + 814531^2 .

It is not an unprimeable number, because it can be changed into a prime (1200121020001) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 336578 + ... + 1585410.

Almost surely, 2^{1200121020002} is an apocalyptic number.

1200121020002 is a deficient number, since it is larger than the sum of its proper divisors (629805430870).

1200121020002 is a wasteful number, since it uses less digits than its factorization.

1200121020002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1256773.

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

Adding to 1200121020002 its reverse (2000201210021), we get a palindrome (3200322230023).

The spelling of 1200121020002 in words is "one trillion, two hundred billion, one hundred twenty-one million, twenty thousand, two".