1221200002010 has 8 divisors (see below), whose sum is σ = 2198160003636. Its totient is φ = 488480000800.

The previous prime is 1221200001979. The next prime is 1221200002031. The reversal of 1221200002010 is 102000021221.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1221199596241 + 405769 = 1105079^2 + 637^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 1221200001982 and 1221200002000.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61060000091 + ... + 61060000110.

Almost surely, 2^{1221200002010} is an apocalyptic number.

1221200002010 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1221200002010 is a deficient number, since it is larger than the sum of its proper divisors (976960001626).

1221200002010 is a wasteful number, since it uses less digits than its factorization.

1221200002010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122120000208.

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

Adding to 1221200002010 its reverse (102000021221), we get a palindrome (1323200023231).

The spelling of 1221200002010 in words is "one trillion, two hundred twenty-one billion, two hundred million, two thousand, ten".