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BaseRepresentation
bin1001101101011100001011…
…01011011111111100111011
32210121021121012020122100112
410312232011223133330323
510244314432422414321
6113225114211054535
74332445323365561
oct466560553377473
983537535218315
1021352525201211
1168926118a9326
12248a3195a144b
13bbb6c4361c99
1453b679667a31
152706651a8a5b

21352525201211 has 4 divisors (see below), whose sum is σ = 21370885069272. Its totient is φ = 21334165333152.

The previous prime is 21352525201193. The next prime is 21352525201223. The reversal of 21352525201211 is 11210252525312.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21352525201211 - 234 = 21335345332027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21352525201261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9179932286 + ... + 9179934611.

It is an arithmetic number, because the mean of its divisors is an integer number (5342721267318).

Almost surely, 221352525201211 is an apocalyptic number.

21352525201211 is a deficient number, since it is larger than the sum of its proper divisors (18359868061).

21352525201211 is a wasteful number, since it uses less digits than its factorization.

21352525201211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18359868060.

The product of its (nonzero) digits is 12000, while the sum is 32.

Adding to 21352525201211 its reverse (11210252525312), we get a palindrome (32562777726523).

The spelling of 21352525201211 in words is "twenty-one trillion, three hundred fifty-two billion, five hundred twenty-five million, two hundred one thousand, two hundred eleven".

Divisors: 1 1163 18359866897 21352525201211