20121211121000 has 96 divisors (see below), whose sum is σ = 51753085642440. Its totient is φ = 7316804000000.

The previous prime is 20121211120979. The next prime is 20121211121069. The reversal of 20121211121000 is 12111212102.

It can be written as a sum of positive squares in 4 ways, for example, as 11555743591876 + 8565467529124 = 3399374^2 + 2926682^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 83024501 + ... + 83266500.

Almost surely, 2^{20121211121000} is an apocalyptic number.

20121211121000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20121211121000 is an abundant number, since it is smaller than the sum of its proper divisors (31631874521440).

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

20121211121000 is a wasteful number, since it uses less digits than its factorization.

20121211121000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166291044 (or 166291019 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 20121211121000 its reverse (12111212102), we get a palindrome (20133322333102).

The spelling of 20121211121000 in words is "twenty trillion, one hundred twenty-one billion, two hundred eleven million, one hundred twenty-one thousand".