211134726621 has 72 divisors (see below), whose sum is σ = 381961734336. Its totient is φ = 110025527040.

The previous prime is 211134726619. The next prime is 211134726643. The reversal of 211134726621 is 126627431112.

211134726621 is a `hidden beast` number, since 2 + 1 + 1 + 1 + 3 + 4 + 7 + 26 + 621 = 666.

It is not a de Polignac number, because 211134726621 - 2¹ = 211134726619 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211134726661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 764241 + ... + 1003161.

It is an arithmetic number, because the mean of its divisors is an integer number (5305024088).

Almost surely, 2^211134726621 is an apocalyptic number.

211134726621 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

211134726621 is a deficient number, since it is larger than the sum of its proper divisors (170827007715).

211134726621 is a wasteful number, since it uses less digits than its factorization.

211134726621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239043 (or 239027 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The spelling of 211134726621 in words is "two hundred eleven billion, one hundred thirty-four million, seven hundred twenty-six thousand, six hundred twenty-one".