21323101421000 has 64 divisors (see below), whose sum is σ = 49938962935680. Its totient is φ = 8521906276800.

The previous prime is 21323101420997. The next prime is 21323101421021. The reversal of 21323101421000 is 12410132312.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8004284 + ... + 10330283.

It is an arithmetic number, because the mean of its divisors is an integer number (780296295870).

Almost surely, 2^{21323101421000} is an apocalyptic number.

21323101421000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21323101421000 is an abundant number, since it is smaller than the sum of its proper divisors (28615861514680).

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

21323101421000 is a wasteful number, since it uses less digits than its factorization.

21323101421000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18335751 (or 18335737 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 21323101421000 its reverse (12410132312), we get a palindrome (21335511553312).

The spelling of 21323101421000 in words is "twenty-one trillion, three hundred twenty-three billion, one hundred one million, four hundred twenty-one thousand".