201210120090 has 64 divisors (see below), whose sum is σ = 613211800320. Its totient is φ = 45990884160.

The previous prime is 201210120019. The next prime is 201210120091. The reversal of 201210120090 is 90021012102.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (201210120091) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 53228301 + ... + 53232080.

It is an arithmetic number, because the mean of its divisors is an integer number (9581434380).

Almost surely, 2^201210120090 is an apocalyptic number.

201210120090 is an abundant number, since it is smaller than the sum of its proper divisors (412001680230).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

201210120090 is a wasteful number, since it uses less digits than its factorization.

201210120090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106460404 (or 106460398 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 201210120090 its reverse (90021012102), we get a palindrome (291231132192).

The spelling of 201210120090 in words is "two hundred one billion, two hundred ten million, one hundred twenty thousand, ninety".