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21100122222122 = 210550061111061
BaseRepresentation
bin1001100110000110000010…
…10010100010111000101010
32202201011002210111210121202
410303003001102202320222
510231201022242101442
6112513132355204202
74305301461434066
oct463030122427052
982634083453552
1021100122222122
1167a5569a08349
1224494182a6662
13ba096b4b3498
1452d373a5caa6
15268ce142ac32
hex1330c14a2e2a

21100122222122 has 4 divisors (see below), whose sum is σ = 31650183333186. Its totient is φ = 10550061111060.

The previous prime is 21100122222077. The next prime is 21100122222139. The reversal of 21100122222122 is 22122222100112.

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

It can be written as a sum of positive squares in only one way, i.e., 20534755077841 + 565367144281 = 4531529^2 + 751909^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21100122222094 and 21100122222103.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5275030555529 + ... + 5275030555532.

Almost surely, 221100122222122 is an apocalyptic number.

21100122222122 is a deficient number, since it is larger than the sum of its proper divisors (10550061111064).

21100122222122 is a wasteful number, since it uses less digits than its factorization.

21100122222122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10550061111063.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 21100122222122 its reverse (22122222100112), we get a palindrome (43222344322234).

The spelling of 21100122222122 in words is "twenty-one trillion, one hundred billion, one hundred twenty-two million, two hundred twenty-two thousand, one hundred twenty-two".

Divisors: 1 2 10550061111061 21100122222122