21140690211 has 6 divisors (see below), whose sum is σ = 30536552540. Its totient is φ = 14093793468.

The previous prime is 21140690203. The next prime is 21140690227. The reversal of 21140690211 is 11209604112.

It is not a de Polignac number, because 21140690211 - 2³ = 21140690203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21140690261) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1174482781 + ... + 1174482798.

Almost surely, 2^21140690211 is an apocalyptic number.

21140690211 is a deficient number, since it is larger than the sum of its proper divisors (9395862329).

21140690211 is a wasteful number, since it uses less digits than its factorization.

21140690211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2348965585 (or 2348965582 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The spelling of 21140690211 in words is "twenty-one billion, one hundred forty million, six hundred ninety thousand, two hundred eleven".