20001211496723 has 2 divisors, whose sum is σ = 20001211496724. Its totient is φ = 20001211496722.

The previous prime is 20001211496719. The next prime is 20001211496731. The reversal of 20001211496723 is 32769411210002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20001211496723 - 2² = 20001211496719 is a prime.

It is a super-2 number, since 2×20001211496723² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20001211496023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10000605748361 + 10000605748362.

It is an arithmetic number, because the mean of its divisors is an integer number (10000605748362).

Almost surely, 2^{20001211496723} is an apocalyptic number.

20001211496723 is a deficient number, since it is larger than the sum of its proper divisors (1).

20001211496723 is an equidigital number, since it uses as much as digits as its factorization.

20001211496723 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 38.

The spelling of 20001211496723 in words is "twenty trillion, one billion, two hundred eleven million, four hundred ninety-six thousand, seven hundred twenty-three".