21401004129 has 16 divisors (see below), whose sum is σ = 29366130048. Its totient is φ = 13853192832.

The previous prime is 21401004091. The next prime is 21401004139. The reversal of 21401004129 is 92140010412.

It is not a de Polignac number, because 21401004129 - 2¹³ = 21400995937 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21401004099 and 21401004108.

It is not an unprimeable number, because it can be changed into a prime (21401004139) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 143892 + ... + 252005.

It is an arithmetic number, because the mean of its divisors is an integer number (1835383128).

Almost surely, 2^21401004129 is an apocalyptic number.

It is an amenable number.

21401004129 is a deficient number, since it is larger than the sum of its proper divisors (7965125919).

21401004129 is a wasteful number, since it uses less digits than its factorization.

21401004129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 396424.

The product of its (nonzero) digits is 576, while the sum is 24.

The spelling of 21401004129 in words is "twenty-one billion, four hundred one million, four thousand, one hundred twenty-nine".