20121121100207 has 2 divisors, whose sum is σ = 20121121100208. Its totient is φ = 20121121100206.

The previous prime is 20121121100183. The next prime is 20121121100221. The reversal of 20121121100207 is 70200112112102.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20121121100207 - 2²⁰ = 20121120051631 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20121121300207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10060560550103 + 10060560550104.

It is an arithmetic number, because the mean of its divisors is an integer number (10060560550104).

Almost surely, 2^{20121121100207} is an apocalyptic number.

20121121100207 is a deficient number, since it is larger than the sum of its proper divisors (1).

20121121100207 is an equidigital number, since it uses as much as digits as its factorization.

20121121100207 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 112, while the sum is 20.

Adding to 20121121100207 its reverse (70200112112102), we get a palindrome (90321233212309).

The spelling of 20121121100207 in words is "twenty trillion, one hundred twenty-one billion, one hundred twenty-one million, one hundred thousand, two hundred seven".