21607435216101 has 32 divisors (see below), whose sum is σ = 34062719765760. Its totient is φ = 11920735217664.

The previous prime is 21607435216069. The next prime is 21607435216111. The reversal of 21607435216101 is 10161253470612.

It is not a de Polignac number, because 21607435216101 - 2⁵ = 21607435216069 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21607435216101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21607435216111) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11170741 + ... + 12961493.

It is an arithmetic number, because the mean of its divisors is an integer number (1064459992680).

Almost surely, 2^{21607435216101} is an apocalyptic number.

21607435216101 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

21607435216101 is a deficient number, since it is larger than the sum of its proper divisors (12455284549659).

21607435216101 is a wasteful number, since it uses less digits than its factorization.

21607435216101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1810605.

The product of its (nonzero) digits is 60480, while the sum is 39.

Adding to 21607435216101 its reverse (10161253470612), we get a palindrome (31768688686713).

The spelling of 21607435216101 in words is "twenty-one trillion, six hundred seven billion, four hundred thirty-five million, two hundred sixteen thousand, one hundred one".