21656021411114 has 16 divisors (see below), whose sum is σ = 32783827083840. Its totient is φ = 10728151129920.

The previous prime is 21656021411081. The next prime is 21656021411117. The reversal of 21656021411114 is 41111412065612.

It is not an unprimeable number, because it can be changed into a prime (21656021411117) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17417702 + ... + 18619569.

It is an arithmetic number, because the mean of its divisors is an integer number (2048989192740).

Almost surely, 2^{21656021411114} is an apocalyptic number.

21656021411114 is a deficient number, since it is larger than the sum of its proper divisors (11127805672726).

21656021411114 is a wasteful number, since it uses less digits than its factorization.

21656021411114 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36040045.

The product of its (nonzero) digits is 11520, while the sum is 35.

Adding to 21656021411114 its reverse (41111412065612), we get a palindrome (62767433476726).

The spelling of 21656021411114 in words is "twenty-one trillion, six hundred fifty-six billion, twenty-one million, four hundred eleven thousand, one hundred fourteen".