21553231011214 has 8 divisors (see below), whose sum is σ = 36948396019248. Its totient is φ = 9237099004800.

The previous prime is 21553231011211. The next prime is 21553231011251. The reversal of 21553231011214 is 41211013235512.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21553231011211) 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, 769758250387 + ... + 769758250414.

It is an arithmetic number, because the mean of its divisors is an integer number (4618549502406).

Almost surely, 2^{21553231011214} is an apocalyptic number.

21553231011214 is a deficient number, since it is larger than the sum of its proper divisors (15395165008034).

21553231011214 is a wasteful number, since it uses less digits than its factorization.

21553231011214 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1539516500810.

The product of its (nonzero) digits is 7200, while the sum is 31.

Adding to 21553231011214 its reverse (41211013235512), we get a palindrome (62764244246726).

The spelling of 21553231011214 in words is "twenty-one trillion, five hundred fifty-three billion, two hundred thirty-one million, eleven thousand, two hundred fourteen".