21140401011 has 16 divisors (see below), whose sum is σ = 28735922688. Its totient is φ = 13820637600.

The previous prime is 21140400971. The next prime is 21140401013. The reversal of 21140401011 is 11010404112.

It is not a de Polignac number, because 21140401011 - 2⁹ = 21140400499 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21140401013) 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, 113931 + ... + 235076.

It is an arithmetic number, because the mean of its divisors is an integer number (1795995168).

Almost surely, 2^21140401011 is an apocalyptic number.

21140401011 is a deficient number, since it is larger than the sum of its proper divisors (7595521677).

21140401011 is a wasteful number, since it uses less digits than its factorization.

21140401011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349402.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21140401011 its reverse (11010404112), we get a palindrome (32150805123).

The spelling of 21140401011 in words is "twenty-one billion, one hundred forty million, four hundred one thousand, eleven".