20112021901 has 2 divisors, whose sum is σ = 20112021902. Its totient is φ = 20112021900.

The previous prime is 20112021899. The next prime is 20112021977. The reversal of 20112021901 is 10912021102.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13485247876 + 6626774025 = 116126^2 + 81405^2 .

It is a cyclic number.

It is not a de Polignac number, because 20112021901 - 2¹ = 20112021899 is a prime.

Together with 20112021899, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20112021301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10056010950 + 10056010951.

It is an arithmetic number, because the mean of its divisors is an integer number (10056010951).

Almost surely, 2^20112021901 is an apocalyptic number.

It is an amenable number.

20112021901 is a deficient number, since it is larger than the sum of its proper divisors (1).

20112021901 is an equidigital number, since it uses as much as digits as its factorization.

20112021901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 19.

The spelling of 20112021901 in words is "twenty billion, one hundred twelve million, twenty-one thousand, nine hundred one".