201121211002120 has 64 divisors (see below), whose sum is σ = 453076550362800. Its totient is φ = 80350054072320.

The previous prime is 201121211002091. The next prime is 201121211002183. The reversal of 201121211002120 is 21200112121102.

It can be written as a sum of positive squares in 8 ways, for example, as 196316583735204 + 4804627266916 = 14011302^2 + 2191946^2 .

It is a junction number, because it is equal to n+sod(n) for n = 201121211002094 and 201121211002103.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 235086496 + ... + 235940464.

Almost surely, 2^{201121211002120} is an apocalyptic number.

201121211002120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

201121211002120 is an abundant number, since it is smaller than the sum of its proper divisors (251955339360680).

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

201121211002120 is a wasteful number, since it uses less digits than its factorization.

201121211002120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 861178 (or 861174 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 201121211002120 its reverse (21200112121102), we get a palindrome (222321323123222).

The spelling of 201121211002120 in words is "two hundred one trillion, one hundred twenty-one billion, two hundred eleven million, two thousand, one hundred twenty".