21121014214400 has 54 divisors (see below), whose sum is σ = 52277810354952. Its totient is φ = 8448405683200.

The previous prime is 21121014214373. The next prime is 21121014214451. The reversal of 21121014214400 is 441241012112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1650072836 + ... + 1650085635.

Almost surely, 2^{21121014214400} is an apocalyptic number.

21121014214400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21121014214400 is an abundant number, since it is smaller than the sum of its proper divisors (31156796140552).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21121014214400 is an equidigital number, since it uses as much as digits as its factorization.

21121014214400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3300158497 (or 3300158478 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 23.

Adding to 21121014214400 its reverse (441241012112), we get a palindrome (21562255226512).

The spelling of 21121014214400 in words is "twenty-one trillion, one hundred twenty-one billion, fourteen million, two hundred fourteen thousand, four hundred".