21010401345 has 32 divisors (see below), whose sum is σ = 34757049600. Its totient is φ = 10829479680.

The previous prime is 21010401301. The next prime is 21010401409. The reversal of 21010401345 is 54310401012.

It is not a de Polignac number, because 21010401345 - 2⁶ = 21010401281 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 44341 + ... + 209730.

It is an arithmetic number, because the mean of its divisors is an integer number (1086157800).

Almost surely, 2^21010401345 is an apocalyptic number.

It is an amenable number.

21010401345 is a deficient number, since it is larger than the sum of its proper divisors (13746648255).

21010401345 is a wasteful number, since it uses less digits than its factorization.

21010401345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254265.

The product of its (nonzero) digits is 480, while the sum is 21.

Adding to 21010401345 its reverse (54310401012), we get a palindrome (75320802357).

The spelling of 21010401345 in words is "twenty-one billion, ten million, four hundred one thousand, three hundred forty-five".