21402123103248 has 40 divisors (see below), whose sum is σ = 55289020800000. Its totient is φ = 7134014868864.

The previous prime is 21402123103247. The next prime is 21402123103271. The reversal of 21402123103248 is 84230132120412.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21402123103247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15951153 + ... + 17240751.

It is an arithmetic number, because the mean of its divisors is an integer number (1382225520000).

Almost surely, 2^{21402123103248} is an apocalyptic number.

It is an amenable number.

21402123103248 is an abundant number, since it is smaller than the sum of its proper divisors (33886897696752).

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

21402123103248 is a wasteful number, since it uses less digits than its factorization.

21402123103248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1635359 (or 1635353 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 33.

The spelling of 21402123103248 in words is "twenty-one trillion, four hundred two billion, one hundred twenty-three million, one hundred three thousand, two hundred forty-eight".