21400122014 has 4 divisors (see below), whose sum is σ = 32100183024. Its totient is φ = 10700061006.

The previous prime is 21400121983. The next prime is 21400122071. The reversal of 21400122014 is 41022100412.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 21400121983 and 21400122001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5350030502 + ... + 5350030505.

It is an arithmetic number, because the mean of its divisors is an integer number (8025045756).

Almost surely, 2^21400122014 is an apocalyptic number.

21400122014 is a deficient number, since it is larger than the sum of its proper divisors (10700061010).

21400122014 is a wasteful number, since it uses less digits than its factorization.

21400122014 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10700061009.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 21400122014 its reverse (41022100412), we get a palindrome (62422222426).

The spelling of 21400122014 in words is "twenty-one billion, four hundred million, one hundred twenty-two thousand, fourteen".