21402432012111 has 8 divisors (see below), whose sum is σ = 28567900472064. Its totient is φ = 14252625780120.

The previous prime is 21402432012107. The next prime is 21402432012151. The reversal of 21402432012111 is 11121023420412.

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

It is not a de Polignac number, because 21402432012111 - 2² = 21402432012107 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21402432012151) 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, 3915553801 + ... + 3915559266.

It is an arithmetic number, because the mean of its divisors is an integer number (3570987559008).

Almost surely, 2^{21402432012111} is an apocalyptic number.

21402432012111 is a deficient number, since it is larger than the sum of its proper divisors (7165468459953).

21402432012111 is an equidigital number, since it uses as much as digits as its factorization.

21402432012111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7831113981.

The product of its (nonzero) digits is 768, while the sum is 24.

Adding to 21402432012111 its reverse (11121023420412), we get a palindrome (32523455432523).

The spelling of 21402432012111 in words is "twenty-one trillion, four hundred two billion, four hundred thirty-two million, twelve thousand, one hundred eleven".