201761121002 has 24 divisors (see below), whose sum is σ = 352135689156. Its totient is φ = 86448636288.

The previous prime is 201761120993. The next prime is 201761121017. The reversal of 201761121002 is 200121167102.

It can be written as a sum of positive squares in 2 ways, for example, as 193636081681 + 8125039321 = 440041^2 + 90139^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 177848 + ... + 659660.

Almost surely, 2^201761121002 is an apocalyptic number.

201761121002 is a deficient number, since it is larger than the sum of its proper divisors (150374568154).

201761121002 is a wasteful number, since it uses less digits than its factorization.

201761121002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 486102 (or 486095 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 23.

Adding to 201761121002 its reverse (200121167102), we get a palindrome (401882288104).

The spelling of 201761121002 in words is "two hundred one billion, seven hundred sixty-one million, one hundred twenty-one thousand, two".