21152211165334 has 16 divisors (see below), whose sum is σ = 31786028282736. Its totient is φ = 10556869300000.

The previous prime is 21152211165289. The next prime is 21152211165347. The reversal of 21152211165334 is 43356111225112.

It is a junction number, because it is equal to n+sod(n) for n = 21152211165293 and 21152211165302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52716249 + ... + 53115979.

It is an arithmetic number, because the mean of its divisors is an integer number (1986626767671).

Almost surely, 2^{21152211165334} is an apocalyptic number.

21152211165334 is a deficient number, since it is larger than the sum of its proper divisors (10633817117402).

21152211165334 is a wasteful number, since it uses less digits than its factorization.

21152211165334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 447791.

The product of its digits is 43200, while the sum is 37.

The spelling of 21152211165334 in words is "twenty-one trillion, one hundred fifty-two billion, two hundred eleven million, one hundred sixty-five thousand, three hundred thirty-four".