990200201202121 has 32 divisors (see below), whose sum is σ = 1223562616657920. Its totient is φ = 780337281199104.

The previous prime is 990200201202077. The next prime is 990200201202131. The reversal of 990200201202121 is 121202102002099.

It is not a de Polignac number, because 990200201202121 - 2¹⁵ = 990200201169353 is a prime.

It is not an unprimeable number, because it can be changed into a prime (990200201202131) 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, 36343761 + ... + 57456673.

It is an arithmetic number, because the mean of its divisors is an integer number (38236331770560).

Almost surely, 2^{990200201202121} is an apocalyptic number.

990200201202121 is a gapful number since it is divisible by the number (91) formed by its first and last digit.

It is an amenable number.

990200201202121 is a deficient number, since it is larger than the sum of its proper divisors (233362415455799).

990200201202121 is a wasteful number, since it uses less digits than its factorization.

990200201202121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21114985.

The product of its (nonzero) digits is 2592, while the sum is 31.

The spelling of 990200201202121 in words is "nine hundred ninety trillion, two hundred billion, two hundred one million, two hundred two thousand, one hundred twenty-one".