21114214401 has 32 divisors (see below), whose sum is σ = 32513944320. Its totient is φ = 11938109184.

The previous prime is 21114214367. The next prime is 21114214409. The reversal of 21114214401 is 10441241112.

It is not a de Polignac number, because 21114214401 - 2¹⁸ = 21113952257 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (21114214409) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1763431 + ... + 1775363.

It is an arithmetic number, because the mean of its divisors is an integer number (1016060760).

Almost surely, 2^21114214401 is an apocalyptic number.

21114214401 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

21114214401 is a deficient number, since it is larger than the sum of its proper divisors (11399729919).

21114214401 is a wasteful number, since it uses less digits than its factorization.

21114214401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12825.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 21114214401 its reverse (10441241112), we get a palindrome (31555455513).

The spelling of 21114214401 in words is "twenty-one billion, one hundred fourteen million, two hundred fourteen thousand, four hundred one".