1200202101 has 12 divisors (see below), whose sum is σ = 1981286112. Its totient is φ = 685829736.

The previous prime is 1200202097. The next prime is 1200202109. The reversal of 1200202101 is 1012020021.

It is not a de Polignac number, because 1200202101 - 2² = 1200202097 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200202109) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9525351 + ... + 9525476.

It is an arithmetic number, because the mean of its divisors is an integer number (165107176).

Almost surely, 2^1200202101 is an apocalyptic number.

It is an amenable number.

1200202101 is a deficient number, since it is larger than the sum of its proper divisors (781084011).

1200202101 is a wasteful number, since it uses less digits than its factorization.

1200202101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19050840 (or 19050837 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 1200202101 is about 34643.9331052350. The cubic root of 1200202101 is about 1062.7182226004.

Adding to 1200202101 its reverse (1012020021), we get a palindrome (2212222122).

The spelling of 1200202101 in words is "one billion, two hundred million, two hundred two thousand, one hundred one".