21270412611 has 24 divisors (see below), whose sum is σ = 35167907424. Its totient is φ = 12135536640.

The previous prime is 21270412547. The next prime is 21270412649. The reversal of 21270412611 is 11621407212.

21270412611 is a `hidden beast` number, since 2 + 1 + 2 + 7 + 0 + 41 + 2 + 611 = 666.

It is not a de Polignac number, because 21270412611 - 2⁶ = 21270412547 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21270412661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 222976 + ... + 303741.

It is an arithmetic number, because the mean of its divisors is an integer number (1465329476).

Almost surely, 2^21270412611 is an apocalyptic number.

21270412611 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

21270412611 is a deficient number, since it is larger than the sum of its proper divisors (13897494813).

21270412611 is a wasteful number, since it uses less digits than its factorization.

21270412611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 527371 (or 527368 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

Adding to 21270412611 its reverse (11621407212), we get a palindrome (32891819823).

The spelling of 21270412611 in words is "twenty-one billion, two hundred seventy million, four hundred twelve thousand, six hundred eleven".