21211312939133 has 4 divisors (see below), whose sum is σ = 21259630281120. Its totient is φ = 21162995597148.

The previous prime is 21211312939121. The next prime is 21211312939151. The reversal of 21211312939133 is 33193921311212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21211312939133 - 2³⁰ = 21210239197309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21211312939433) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24158670335 + ... + 24158671212.

It is an arithmetic number, because the mean of its divisors is an integer number (5314907570280).

Almost surely, 2^{21211312939133} is an apocalyptic number.

It is an amenable number.

21211312939133 is a deficient number, since it is larger than the sum of its proper divisors (48317341987).

21211312939133 is an equidigital number, since it uses as much as digits as its factorization.

21211312939133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48317341986.

The product of its digits is 52488, while the sum is 41.

The spelling of 21211312939133 in words is "twenty-one trillion, two hundred eleven billion, three hundred twelve million, nine hundred thirty-nine thousand, one hundred thirty-three".