20201121122007 has 16 divisors (see below), whose sum is σ = 32593405508352. Its totient is φ = 10864468502400.

The previous prime is 20201121122003. The next prime is 20201121122027. The reversal of 20201121122007 is 70022112110202.

It is not a de Polignac number, because 20201121122007 - 2² = 20201121122003 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20201121122003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28292886369 + ... + 28292887082.

It is an arithmetic number, because the mean of its divisors is an integer number (2037087844272).

Almost surely, 2^{20201121122007} is an apocalyptic number.

20201121122007 is a deficient number, since it is larger than the sum of its proper divisors (12392284386345).

20201121122007 is a wasteful number, since it uses less digits than its factorization.

20201121122007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56585773478.

The product of its (nonzero) digits is 224, while the sum is 21.

Adding to 20201121122007 its reverse (70022112110202), we get a palindrome (90223233232209).

The spelling of 20201121122007 in words is "twenty trillion, two hundred one billion, one hundred twenty-one million, one hundred twenty-two thousand, seven".