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12212022222 = 2325211302199
BaseRepresentation
bin10110101111110010…
…01010101111001110
31011112002002000011100
423113321022233032
5200002234202342
65335442003530
7611424322221
oct132771125716
934462060140
1012212022222
1151a7406054
1224499465a6
1311c806ac6a
1483bc4d5b8
154b71a1e4c
hex2d7e4abce

12212022222 has 24 divisors (see below), whose sum is σ = 26510187600. Its totient is φ = 4062857760.

The previous prime is 12212022203. The next prime is 12212022257. The reversal of 12212022222 is 22222021221.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 12212022195 and 12212022204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 641722 + ... + 660477.

It is an arithmetic number, because the mean of its divisors is an integer number (1104591150).

Almost surely, 212212022222 is an apocalyptic number.

12212022222 is an abundant number, since it is smaller than the sum of its proper divisors (14298165378).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12212022222 is a wasteful number, since it uses less digits than its factorization.

12212022222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1302728 (or 1302725 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 12212022222 its reverse (22222021221), we get a palindrome (34434043443).

The spelling of 12212022222 in words is "twelve billion, two hundred twelve million, twenty-two thousand, two hundred twenty-two".

Divisors: 1 2 3 6 9 18 521 1042 1563 3126 4689 9378 1302199 2604398 3906597 7813194 11719791 23439582 678445679 1356891358 2035337037 4070674074 6106011111 12212022222