21354734077311 has 4 divisors (see below), whose sum is σ = 28472978769752. Its totient is φ = 14236489384872.

The previous prime is 21354734077289. The next prime is 21354734077351. The reversal of 21354734077311 is 11377043745312.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 21354734077311 - 2⁶ = 21354734077247 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21354734077351) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3559122346216 + ... + 3559122346221.

It is an arithmetic number, because the mean of its divisors is an integer number (7118244692438).

Almost surely, 2^{21354734077311} is an apocalyptic number.

21354734077311 is a deficient number, since it is larger than the sum of its proper divisors (7118244692441).

21354734077311 is an equidigital number, since it uses as much as digits as its factorization.

21354734077311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7118244692440.

The product of its (nonzero) digits is 1481760, while the sum is 48.

The spelling of 21354734077311 in words is "twenty-one trillion, three hundred fifty-four billion, seven hundred thirty-four million, seventy-seven thousand, three hundred eleven".