21116701206722 has 8 divisors (see below), whose sum is σ = 34554601974672. Its totient is φ = 9598500548500.

The previous prime is 21116701206707. The next prime is 21116701206793. The reversal of 21116701206722 is 22760210761112.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 479925027404 + ... + 479925027447.

It is an arithmetic number, because the mean of its divisors is an integer number (4319325246834).

Almost surely, 2^{21116701206722} is an apocalyptic number.

21116701206722 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21116701206722 is a deficient number, since it is larger than the sum of its proper divisors (13437900767950).

21116701206722 is a wasteful number, since it uses less digits than its factorization.

21116701206722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 959850054864.

The product of its (nonzero) digits is 28224, while the sum is 38.

Adding to 21116701206722 its reverse (22760210761112), we get a palindrome (43876911967834).

The spelling of 21116701206722 in words is "twenty-one trillion, one hundred sixteen billion, seven hundred one million, two hundred six thousand, seven hundred twenty-two".