1202100221 has 16 divisors (see below), whose sum is σ = 1457073408. Its totient is φ = 969408000.

The previous prime is 1202100191. The next prime is 1202100239. The reversal of 1202100221 is 1220012021.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1202100221 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1202100421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51380 + ... + 71021.

It is an arithmetic number, because the mean of its divisors is an integer number (91067088).

Almost surely, 2^1202100221 is an apocalyptic number.

It is an amenable number.

1202100221 is a deficient number, since it is larger than the sum of its proper divisors (254973187).

1202100221 is a wasteful number, since it uses less digits than its factorization.

1202100221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122492.

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

The square root of 1202100221 is about 34671.3169781593. The cubic root of 1202100221 is about 1063.2781572594.

Adding to 1202100221 its reverse (1220012021), we get a palindrome (2422112242).

The spelling of 1202100221 in words is "one billion, two hundred two million, one hundred thousand, two hundred twenty-one".