20121002122100 has 36 divisors (see below), whose sum is σ = 47631899571648. Its totient is φ = 7316728044000.

The previous prime is 20121002122099. The next prime is 20121002122147. The reversal of 20121002122100 is 122120012102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9145908956 + ... + 9145911155.

Almost surely, 2^{20121002122100} is an apocalyptic number.

20121002122100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20121002122100 is an abundant number, since it is smaller than the sum of its proper divisors (27510897449548).

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

20121002122100 is a wasteful number, since it uses less digits than its factorization.

20121002122100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18291820136 (or 18291820129 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 20121002122100 its reverse (122120012102), we get a palindrome (20243122134202).

The spelling of 20121002122100 in words is "twenty trillion, one hundred twenty-one billion, two million, one hundred twenty-two thousand, one hundred".