21401223333403 has 12 divisors (see below), whose sum is σ = 22114168587000. Its totient is φ = 20710567712640.

The previous prime is 21401223333401. The next prime is 21401223333421. The reversal of 21401223333403 is 30433332210412.

It is a happy number.

It is not a de Polignac number, because 21401223333403 - 2¹ = 21401223333401 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is not an unprimeable number, because it can be changed into a prime (21401223333401) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 102171723 + ... + 102380971.

It is an arithmetic number, because the mean of its divisors is an integer number (1842847382250).

Almost surely, 2^{21401223333403} is an apocalyptic number.

21401223333403 is a deficient number, since it is larger than the sum of its proper divisors (712945253597).

21401223333403 is a wasteful number, since it uses less digits than its factorization.

21401223333403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315738 (or 315707 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 31.

Adding to 21401223333403 its reverse (30433332210412), we get a palindrome (51834555543815).

The spelling of 21401223333403 in words is "twenty-one trillion, four hundred one billion, two hundred twenty-three million, three hundred thirty-three thousand, four hundred three".