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21211011212 = 2210164738111
BaseRepresentation
bin10011110000010001…
…100101100010001100
32000202020021000022212
4103300101211202030
5321420004324322
613424425325552
71350425422556
oct236021454214
960666230285
1021211011212
118aa5076736
12413b6368b8
132000556011
1410530804d6
1584222e0e2
hex4f046588c

21211011212 has 24 divisors (see below), whose sum is σ = 37497200832. Its totient is φ = 10497584000.

The previous prime is 21211011203. The next prime is 21211011251.

It can be divided in two parts, 212110 and 11212, that added together give a palindrome (223322).

21211011212 is nontrivially palindromic in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2611037 + ... + 2619147.

It is an arithmetic number, because the mean of its divisors is an integer number (1562383368).

Almost surely, 221211011212 is an apocalyptic number.

It is an amenable number.

21211011212 is a deficient number, since it is larger than the sum of its proper divisors (16286189620).

21211011212 is a wasteful number, since it uses less digits than its factorization.

21211011212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14689 (or 14687 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

The spelling of 21211011212 in words is "twenty-one billion, two hundred eleven million, eleven thousand, two hundred twelve".

Divisors: 1 2 4 101 202 404 6473 8111 12946 16222 25892 32444 653773 819211 1307546 1638422 2615092 3276844 52502503 105005006 210010012 5302752803 10605505606 21211011212